[Definitive Guide] Complete List of Gemstone Materials: Features, Value, and How to Choose, Explained by a Pro

"What kind of gem is this brilliant? "What material would be good for a gift?" Choosing jewelry begins with knowing the materials. This article provides a comprehensive list of all types of gemstone materials, from natural stones that have captivated people since ancient times to artificial stones created by modern technology, and precious metals that hold universal value. We will explain the unique characteristics, meanings, and factors that determine the value of each gemstone from a professional perspective, in an easy-to-understand manner. After reading this article, you too will be able to choose jewelry that maximizes the charm of the material, just like a gemstone expert. Now, let's begin your encounter with your own special gemstone.

Basics of Gemstone Materials: Natural Stones, Artificial Stones, and Precious Metals

While gemstone materials are classified in many ways, this article will focus specifically on materials used in jewelry and clarify their basic distinctions. From those born from the earth's natural bounty, to those created by human technology, and the precious metals that bind them both. Understanding the fundamental characteristics of each material is the first step in choosing gemstones.

What are natural stones?

Natural stones refer to minerals and organic matter formed over thousands or even hundreds of millions of years by the Earth's natural processes. Because these stones are created by a miraculous combination of various natural conditions such as heat, pressure, and chemical reactions underground, they possess a "one-of-a-kind" charm, with no two being exactly alike. Their rarity, unique beauty, and the romance of telling the Earth's history have captivated people since ancient times. Diamonds, rubies, sapphires, and emeralds are well-known examples of natural stones.

What are artificial stones?

Artificial stones refer to all gemstone materials created by human hands, and are broadly classified into "synthetic stones" and "imitation stones".

• Synthetic stones: These are artificially grown in a laboratory to have the exact same chemical composition, crystal structure, and physical properties as natural stones. Not only their appearance, but also their hardness and refractive index are almost identical to natural stones, making them difficult for even experts to distinguish. Synthetic rubies and synthetic sapphires fall into this category.
• Imitation stones: These are made to mimic the appearance and brilliance of natural stones, but their chemical composition and crystal structure are different from natural stones. For example, cubic zirconia and moissanite, which have a brilliance similar to diamonds, are typical examples. They are widely used in fashion jewelry because they offer beautiful brilliance at an affordable price.

What are precious metals?

Precious metals are a general term for metals that are chemically stable, highly rare, and resistant to corrosion and discoloration. Due to their beauty and durability, they have been widely used as jewelry settings and ornaments since ancient times.
Representative precious metals include "platinum," which has a pure brilliance and is unlikely to cause allergies, "gold," which is loved for its brilliance and ease of processing, and "silver," which is used in a wide range of designs at an affordable price. These precious metals not only enhance the brilliance of gemstones but are also indispensable for maintaining the durability and asset value of jewelry. Palladium is also known as a precious metal.

List of All Major Gemstone Material Types

Here, we will introduce in detail the major gemstone materials that are particularly popular in the world of jewelry and continue to fascinate many people. By knowing the unique brilliance, color, and stories behind each gemstone, your jewelry selection will become even richer.

Diamond

Diamonds, known as the "king of gemstones," have captivated people since ancient times with their unparalleled hardness and dazzling brilliance. They are natural carbon crystals formed deep within the Earth and are known as the hardest substance on Earth. Their value is assessed by international standards called the "4Cs": carat (weight), cut (brilliance), color (color), and clarity (transparency). As a classic engagement ring for pledging eternal love, they enjoy immense popularity worldwide.

Ruby

Rubies, characterized by their passionate deep red glow, are also known as the "queen of gemstones" and symbolize love, passion, and victory. They are a type of mineral called corundum, and their beautiful red color is produced by trace amounts of chromium. Especially rare "pigeon's blood" rubies from Myanmar, with their deep red color, are prized as top-grade specimens. They are also the birthstone for July and are believed to give vitality to the wearer.

Sapphire

Sapphire, with its captivating deep and clear blue, is a gemstone belonging to the corundum family, just like ruby. While blue sapphires are the most famous, there are also "fancy sapphires" that come in a variety of colors, such as pink, yellow, green, and purple. It is the birthstone for September and symbolizes sincerity, compassion, and virtue. It is often used in royal jewelry, radiating a noble brilliance.

Emerald

Emerald, characterized by its vivid green color, is a type of beryl mineral that has been revered since ancient times as a symbol of wealth and rebirth. It often contains distinctive inclusions called "jardin" (garden), which are considered proof of its natural origin. It is the birthstone for May and is said to bring happiness, good fortune, and marital love. Its unique green color brings peace and healing to the wearer.

Amethyst

Amethyst, with its beautiful translucent purple color, is a type of quartz. In ancient Greece, it was believed to be a "stone to prevent intoxication" and was also cherished by royalty and clergy for its noble color. It is the birthstone for February and symbolizes true love, peace of mind, and tranquility. Its calm hue is said to bring spiritual harmony and have a relaxing effect.

Topaz

Topaz is a gemstone with a very diverse range of colors. Particularly popular are "Imperial Topaz" with a sherry-like hue, and "Blue Topaz" with a beautiful translucent blue. It is the birthstone for November and is said to symbolize friendship, hope, and wisdom. It is also believed to bring brightness and vitality to the wearer and support the achievement of goals.

Garnet

Garnet, with its impressive deep red brilliance, is actually a collective name for a mineral group with many varieties. Representative types include deep red pyrope garnet and almandine garnet. It is the birthstone for January and symbolizes truth, friendship, and loyalty, and is believed to have the power to bring success to the wearer's efforts. Due to its diverse colors, it is a popular gemstone among collectors.

Aquamarine

Aquamarine, with its beautiful, translucent, sea-like blue color, is a type of beryl, like emerald. Its name means "water of the sea" in Latin, and it has been treasured as an amulet for sailors since ancient times. It is the birthstone for March and is said to bring happiness, wealth, intelligence, and protect safe voyages. It brings calm and healing to the wearer.

Peridot

Peridot, characterized by its vivid yellowish-green color, was revered as the "sun stone" in ancient Egypt and was believed to have the power to dispel the darkness of night and ward off evil. It is the birthstone for August and is said to bring marital happiness, harmony, and hope. Its bright color gives positive energy to the viewer and brightens the mood.

Opal

Opal, with its unique play of color, is a unique gemstone that sparkles in various iridescent colors depending on the viewing angle. Its mysterious brilliance has captivated many people since ancient times. It is the birthstone for October and symbolizes hope, purity, and happiness, and is said to enhance creativity. The appearance varies greatly depending on the type, such as black opal, white opal, and fire opal.

Other Notable Natural Stones

In addition to the famous gemstones mentioned above, there are many unique and charming natural stones in the world. For example, the beautifully pleochroic "tourmaline" comes in a wide variety of colors such as pink, green, and blue, and its rich variations make it popular among collectors. The mysterious shimmering "moonstone" is said to harbor moonlight, as its name suggests, and is particularly loved by women. Also, "alexandrite," which changes color depending on the viewing angle, "tanzanite," characterized by its deep bluish-purple, and "zircon," which has a brilliance similar to diamonds, each possess their own unique charm. These gemstones will give your jewelry a special individuality.

Artificial Stones (Synthetic and Imitation Stones)

The evolution of artificial stones, brought about by modern technology, is remarkable, distinct from the beauty of natural stones. These stones are beginning to be recognized not only as substitutes for natural stones but also as possessing their own unique charm and value. Here, we delve into how artificial stones are made and what characteristics they possess.
Artificial stones are broadly classified into two types: "synthetic stones" and "imitation stones." Synthetic stones are artificially created to have the same chemical composition and crystal structure as natural stones, while imitation stones are made to resemble natural stones but have different chemical compositions and structures.

Cubic Zirconia

Cubic Zirconia (CZ) is a widely popular artificial stone known for its brilliance, similar to that of a diamond. Its main component is zirconium oxide, and its high refractive index gives it a strong light dispersion (fire) and brilliance like a diamond. Because it is relatively inexpensive and can be produced in various colors and cuts, it is widely used in fashion jewelry and accessories.

Moissanite

While moissanite is a very rare mineral in nature, artificially synthesized moissanite is known for its hardness (9.25 on the Mohs scale), comparable to diamonds, and even stronger brilliance (fire) than diamonds. Its main component is silicon carbide, and due to its beautiful brilliance and durability, it has recently attracted particular attention as a high-quality alternative to diamonds.

Synthetic Rubies, Sapphires, etc.

Synthetic rubies and synthetic sapphires are artificially created gemstones that have the same chemical composition (aluminum oxide) and crystal structure as natural rubies and sapphires. They possess the same beautiful color and brilliance as natural stones, and their low impurity content results in very clear quality. They are supported by a wide range of people because they allow them to enjoy beautiful jewelry that is indistinguishable from natural stones, while keeping costs down. These synthetic stones are also widely used in industrial applications.

Precious Metals

Precious metals underpin the brilliance of gemstones and enhance their value as jewelry. These metals have captivated people since ancient times due to their beauty, rarity, and durability. Here, we will delve into the types of major precious metals, their characteristics, and their role in jewelry.

Platinum

Platinum is a popular precious metal, especially for engagement and wedding rings, due to its pure white brilliance, high durability, and rarity. It is chemically stable and therefore resistant to tarnishing, and it also has the characteristic of being less likely to cause metal allergies. Purity is generally indicated as Pt950 (95% pure) or Pt900 (90% pure), with the remaining percentage consisting of palladium or other metals added to increase strength.

Gold

Gold, with its universal value and beautiful luster, has been loved as a jewelry material since ancient times. Pure gold (K24) is very soft, so it is alloyed with copper, silver, palladium, etc., to increase its strength and create various shades such as yellow gold, white gold, and pink gold. Purity is generally K18 (75% pure) or K14 (58.5% pure), and a higher K value indicates a higher gold content.

Silver

Silver, used in a wide range of jewelry designs due to its affordable price and ease of processing, possesses a distinctive white luster. However, it also has a tendency to tarnish and blacken when it reacts with sulfur components in the air. For jewelry, "sterling silver (SV925)," which is 92.5% pure, is common, with the remaining 7.5% composed of metals such as copper to enhance strength and workability.

Other Precious Metals (Palladium, etc.)

Palladium, one of the platinum group elements, has a white luster similar to platinum but is lighter and harder than platinum. While it was once used as a standalone jewelry material, it is now often used as an alloy with platinum or white gold to adjust strength and color. In addition, rhodium is applied as a plating on the surface of platinum and white gold to provide a more beautiful white luster and durability.

Birthstone List: Gemstones and Their Meanings by Month

Birthstones are special gemstones believed to bring good fortune to people born in that month. Knowing your birthstone expands the enjoyment of choosing more personalized jewelry. Here, we introduce each month's birthstone and the meaning it carries in detail.

January Birthstone: Garnet

Garnet, the birthstone for January, symbolizes "fruitfulness," "truth," and "friendship." Characterized by its deep red brilliance, it is believed to give power for achieving goals and for efforts to be rewarded. Wearing it is said to ignite the wearer's passion and lead to success.

February Birthstone: Amethyst

Amethyst, the birthstone for February, symbolizes "true love," "peace of mind," and "sincerity." Characterized by its noble purple color, it is said to have the power to calm the mind and enhance inspiration. It is the perfect gemstone for those seeking inner peace and gentle affection.

March Birthstone: Aquamarine, Bloodstone

The birthstones for March are translucent "aquamarine" and "bloodstone," characterized by its deep green with red flecks. Aquamarine symbolizes "happiness," "intelligence," and "courage," while bloodstone symbolizes "courage" and "health." Both gemstones possess a refreshing charm that evokes the arrival of spring.

April Birthstone: Diamond

The birthstone for April is "diamond," also known as the king of gemstones. Symbolizing "eternal love," "purity," and "indomitability," its unparalleled brilliance and hardness represent ultimate beauty and power. The supremely brilliant diamond continues to be chosen as a special gift.

May Birthstone: Emerald

Emerald, the birthstone for May, is a gem that symbolizes "happiness," "good fortune," and "marital love." Its vibrant green color is said to provide healing and rejuvenation. Fitting for the season of new growth, emerald evokes vitality and hope.

June Birthstones: Pearl, Moonstone, Alexandrite

The birthstones for June are three types: the graceful "pearl," the mysterious "moonstone," and "alexandrite," known for its color-changing effect. Pearl symbolizes "health," "wealth," and "longevity," moonstone symbolizes "the premonition of love" and "mystery," and alexandrite symbolizes "hidden thoughts." Gemstones with mysterious charm are gathered, radiating a special brilliance.

July Birthstone: Ruby

Ruby, the birthstone for July, is a gemstone symbolizing "passion," "love," and "victory." Its fiery red color is believed to bring vitality and success to the wearer. Cherished as the "Queen of Gems" since ancient times, it is said to bestow strong life force and charisma.

August Birthstone: Peridot, Sardonyx

The birthstones for August are "peridot," with its vivid yellowish-green color, and "sardonyx," characterized by its banded patterns. Peridot symbolizes "marital happiness" and "harmony," while sardonyx symbolizes "happiness" and "success." Characterized by a bright sparkle like the summer sun, they provide positive energy.

September Birthstone: Sapphire

Sapphire, the birthstone for September, is a gemstone that symbolizes "sincerity," "compassion," and "virtue." Its deep, clear blue color is said to bring peace of mind and intellect. It is also believed to have the power to enhance concentration and intuition, and has been cherished by royalty and clergy since ancient times.

October Birthstone: Opal, Tourmaline

The birthstones for October are "opal," which radiates a rainbow glow, and "tourmaline," charming for its diverse hues. Opal symbolizes "hope," "purity," and "creativity," while tourmaline symbolizes "hope" and "innocence." Its mysterious brilliance and diverse colors captivate observers.

November Birthstone: Topaz, Citrine

The birthstones for November are translucent "topaz" and golden "citrine." Topaz symbolizes "friendship," "hope," and "wisdom," while citrine symbolizes "prosperity," "wealth," and "happiness." Characterized by warm hues, they bring bright energy to the wearer.

December Birthstone: Turquoise, Tanzanite, Zircon

The birthstones for December are vivid sky-blue "turquoise," mysterious bluish-purple "tanzanite," and beautiful sparkling "zircon." Turquoise symbolizes "success" and "prosperity," tanzanite symbolizes "nobility" and "intellect," and zircon symbolizes "peace" and "tranquility." Characterized by the beautiful blue of a winter sky, they are said to calm the mind and invite good fortune.

The Charm of Color Stones: Enjoying a Variety of Hues

The greatest charm of color stones, as their name suggests, is their diverse "colors." Beyond the traditional four major gemstones, a variety of colored gemstones enable individual and rich expression. Here, we focus on the diverse hues of color stones and introduce the charm of each color and representative gemstones.

Red Color Stones

Passionate and strong red has captivated people since ancient times. Representative gemstones include "ruby," symbolizing passion and victory, "garnet," characterized by its deep red, and "spinel," which has a beautiful red color similar to ruby. These red color stones symbolize love and vitality, giving the wearer a strong presence and glamour.

Blue Color Stones

Deep and calm blue is popular as a color symbolizing intellect, calmness, and trust. Representative gemstones include "sapphire," reminiscent of the sky and sea, beautiful clear water-colored "aquamarine," and "tanzanite," with its charming pleochroism. These blue color stones give a cool impression and create a calm beauty.

Green Color Stones

The soothing and calming green color symbolizes connection to nature and growth. Representative gemstones include the vibrant green of "emerald," the fresh green hue of "peridot," and "tourmaline," which comes in a variety of green shades. Green color stones provide a sense of calm and comfort to the observer, expressing a gentle beauty.

Yellow and Orange Color Stones

Bright and cheerful yellow and orange are colors that symbolize hope, happiness, and creativity. Representative gemstones include "citrine," which radiates a sun-like glow, yellow and orange varieties of "topaz," which come in diverse hues, and "yellow sapphire." These color stones impart positive energy and give the wearer a bright and glamorous impression.

Purple Color Stones

Noble and mysterious purple is known as a color symbolizing spirituality, intuition, and healing. Representative gemstones include the captivating deep purple "amethyst," purple found in some tanzanite, and the beautiful purple of spinel. Purple color stones create a sophisticated atmosphere and enhance unique and elegant charm.

Other Unique Color Stones

Among color stones, there are also gemstones whose uniqueness lies not just in a specific color, but in their very characteristics. For example, "opal" is most captivating for its "play-of-color," where various hues shift depending on the viewing angle. "Alexandrite," on the other hand, is a very rare gemstone that exhibits a "color-change effect," appearing green in natural light and changing to red under incandescent light. These unique color stones offer unparalleled individuality and surprise, adding a special story to your jewelry.

Factors Determining Gemstone Value

The value of a gemstone is determined not only by its apparent beauty but also by various factors. While the "4Cs" used for diamonds are well-known, color stones and precious metals each have different evaluation criteria. Here, we will explain the main factors that determine gemstone value in detail, providing knowledge for smart gemstone selection.

Rarity

One of the major factors influencing a gemstone's value is its "rarity." The scarcity of its occurrence on Earth directly impacts its value. Gemstones that are only found in specific regions or deep underground tend to be more expensive due to their difficulty in acquisition. For example, what are called mythical gemstones are given a very high value due to their rarity.

Quality (Cut, Clarity, Color, Carat)

The "4Cs," widely known as diamond grading standards, are important indicators for objectively measuring gemstone quality. This concept is also applied to color stones.

• Cut: The quality of polishing to maximize the gemstone's brilliance. Especially in diamonds, light reflection and symmetry are highly valued.
• Clarity: The transparency of the gemstone and the presence or absence of inclusions. The fewer inclusions, the higher the transparency and the greater the value.
• Color: The hue of the gemstone. For diamonds, the closer to colorless, the higher the value, while for color stones, vivid and uniform color is particularly prized.
• Carat: A unit of weight for gemstones. 1 carat is equivalent to approximately 0.2 grams, and generally, a higher carat weight leads to a higher value.

The better balanced these four elements are, the higher the quality of the gemstone is rated, and its value increases accordingly.

Market Trends and Popularity

The value of gemstones also fluctuates based on current market trends and popularity. When certain gemstones gain attention as a fashion trend or increased interest as an investment, demand may temporarily outstrip supply, causing prices to rise. Conversely, prices tend to stabilize once popularity wanes. Fashion, cultural background, and even economic conditions are all factors that influence the market value of gemstones.

Presence of Treatment

Many gemstones undergo various treatments to enhance their beauty. For example, heat treatment is often performed to improve color or clarity, and oil impregnation is used to make surface scratches on emeralds less noticeable. Whether these artificial treatments have been applied significantly impacts the value of a gemstone. Generally, untreated gemstones with natural beauty are highly valued for their rarity and tend to be more expensive than treated ones. However, not all treatments lower value, as some, like heat treatment, are widely accepted. The key is to accurately understand what treatments have been applied.

Gemstone Care Methods and Precautions

To keep your precious jewelry beautiful for a long time, proper care is essential. Since care methods differ depending on the type of gemstone and precious metal, it is necessary to provide care tailored to each material's characteristics. Here, we introduce specific methods and precautions for maintaining the beauty of gemstones, from daily care to professional cleaning.

Daily Care

To maintain the sparkle of your jewelry, a little daily effort goes a long way. After wearing, gently wipe away any sebum, sweat, or cosmetics with a soft cloth (such as a jewelry cloth). This prevents dirt from accumulating and helps maintain its luster. Additionally, removing jewelry during bathing, sleeping, or strenuous exercise can prevent issues such as stones falling out, scratches, or discoloration.

Precautions by Material

Because gemstones and precious metals each possess unique characteristics, care must be tailored to the material.

• Diamonds: Due to their high hardness and durability, they can be gently washed in lukewarm water with a mild detergent and cleaned with a soft brush. Ultrasonic cleaning is also possible, but should be avoided for those with many inclusions or in combination with other gemstones.
• Rubies and Sapphires: Like diamonds, they are relatively durable, but rapid temperature changes should be avoided if they have been heat-treated. Cleaning with a mild detergent is possible.
• Emeralds: Very delicate gemstones, vulnerable to impact and sensitive to dryness. Avoid ultrasonic and steam cleaning, and only gently wipe with a soft cloth.
• Pearls: Organic gemstones that are sensitive to acids, alkalis, heat, and perspiration. Always wipe with a soft cloth after use and store separately from other jewelry. Never use ultrasonic cleaning.
• Precious metals (platinum, gold, silver): Platinum and gold are relatively resistant to deterioration, but silver can tarnish and blacken when exposed to sulfur compounds in the air. Silver can be polished with a dedicated cloth or cleaner, or you can use a method with baking soda and aluminum foil.

Professional Cleaning

For stubborn dirt that cannot be removed by home care alone, or for regular maintenance, we recommend entrusting cleaning to a professional jeweler or jewelry workshop. Experts can identify the type, material, and condition of the gemstone and perform cleaning and polishing using appropriate methods. This restores the original brilliance of the jewelry and allows for checking for loose stones and minor scratches, thus preventing potential problems. Consult with the store where you purchased the item or a trusted professional.

Tips for Finding the Perfect Gemstone Material for You

Finding the perfect material from the myriad of gemstone options is one of the greatest pleasures of choosing jewelry. This article explains the key points for selecting materials from various perspectives, such as the purpose of the gift, everyday use, or future asset value. Use this article as a guide to discover your special gemstone.

Key Points for Choosing a Gift

When choosing a gift for a loved one, considering their preferences and lifestyle is paramount. It can be helpful to draw inspiration from the color and design of jewelry they usually wear, or their favorite colors. Choosing based on the meanings embedded in birthstones or gemstone words is also a wonderful way to convey personal feelings. Select the optimal material with deep affection and gratitude for the recipient.

Jewelry Materials for Everyday Use

For everyday jewelry, durability and ease of care are key factors. Hard gemstones that are resistant to scratches (such as diamonds, rubies, and sapphires) and precious metals like platinum and gold that do not tarnish easily are ideal for daily wear. Additionally, choosing materials that are strong against impact and relatively safe for everyday water exposure will result in jewelry that can be cherished for a long time.

Material Selection Considering Asset Value

If you prioritize future asset value, rare gemstones and precious metals with established international reputations are good choices. For diamonds, those with high 4Cs (carat, cut, clarity, color) are valuable, while colored stones like rubies, sapphires, and emeralds gain particular value when they meet high-quality assessment standards for colored stones. Platinum and high-purity gold are also known as materials with stable asset value.

Material Selection to Express Individuality

Beyond classic gemstones, you can express your individuality by choosing colored stones with unique hues and properties, or natural stones with specific meanings. For example, opals with beautiful play-of-color, alexandrites that change color depending on the viewing angle, or rutile quartz with distinctive inclusions can highlight the wearer's individuality. Enjoy choosing materials that tell your own unique story.

Summary: Deepen Your Knowledge of Gemstone Materials to Enrich Your Jewelry Life

Through this article, you have gained extensive knowledge about gemstone materials. The mystery of natural stones, the evolution of artificial stones, and the universal value of precious metals. By understanding the story and characteristics of each material, jewelry becomes more than just an ornament.
We have explored a wide range of gemstone materials, from the allure of traditional natural stones like diamonds, rubies, and sapphires, to new options offered by artificial stones such as cubic zirconia and moissanite, and the universal value of precious metals like platinum and gold. We have also delved deeper into the meanings of birthstones and colored stones, the factors that determine gemstone value, and essential care methods.
This knowledge will not only serve as a reference when choosing jewelry but also as a powerful tool for selecting gifts, wealth creation, and expressing your individuality. By understanding the story contained within each gem and the power of its brilliance, your jewelry life will become even richer and more meaningful.
We hope this knowledge helps make your jewelry life richer and more meaningful. Please use this guide to find your ultimate sparkle.

Supervisor of this Article

This article is supervised by Masakatsu Oneda, Representative Director of "GINZA VINTAGE JEWELRY."
Leveraging the discerning eye and market knowledge cultivated over 15 years in the luxury brand business, he now specializes exclusively in vintage jewelry, focusing on accurately conveying the charm and background of valuable one-of-a-kind pieces.