GEM ENCYCLOPEDIA – gr-si.com

GRSI’s Guide to Gemstones: Gem Encyclopedia

GRSI’s Gem Encyclopedia offers a virtual journey into the science and history of gemstones from around the world. Each gemstone page provides detailed gemological information, a buyer’s guide, high-quality photos, videos, and research insights.

PERIDOT

Found in lava, meteorites, and deep within the Earth's mantle, yellow-green peridot is a gem of extraordinary origins.

AMBER

Amber is nature’s time capsule, preserving traces of ancient life within its fossilized tree resin for millions of years.

ALEXANDRITE

Green in sunlight, red in lamplight—alexandrite’s stunning color change is nature’s very own magic trick.

AMETHYST

Amethyst, the essence of purple, is stunning enough for crown jewels yet affordable for class rings.

AMETRINE

This transparent quartz displays the hues of both amethyst and citrine, earning it the name ametrine.

AQUAMARINE

Named after seawater, aquamarine's serene blue hue is like a refreshing plunge into crystal-clear waters.

CITRINE

Citrine is a transparent quartz variety, ranging in color from pale yellow to brownish orange.

DIAMOND

Diamonds are one of nature’s most exquisite and treasured creations.

FANCY COLOR DIAMOND

Found in lava, meteorites, and deep within the Earth's mantle, yellow-green peridot is a gem of extraordinary origins.

EMERALD

Emerald is the green to bluish-green variety of beryl, the same mineral family as aquamarine.

GARNET

Garnets are a group of closely related minerals, offering gemstones in nearly every color.

IOLITE

Legend has it that Vikings used iolite slices to cut glare while navigating by the sun.

JADE

"Jade" is a broad term for nephrite, jadeite, and, in some cases, green omphacite. In China, a pierced jade disk symbolizes heaven.

KUNZITE

Collectors cherish kunzite for its stunning color spectrum, ranging from soft pastel pink to vibrant violetish purple.

LAPIS LAZULI

Lapis is a stunning rock composed of multiple minerals, primarily lazurite, calcite, and pyrite.

MOONSTONE

A mystical glow drifts beneath the surface of this feldspar, resembling moonlight shimmering on water.

MORGANITE

Morganite is the pink to orange-pink variety of beryl, the same mineral family as emerald and aquamarine.

OPAL

Fireworks, jellyfish, galaxies, lightning—opal’s mesmerizing play of colors is truly one of a kind.

PEARL

Perfectly radiant spheres, lustrous baroque shapes, and alluring strands—pearls are nature’s purest organic gems.

ROSE QUARTZ

Rose quartz is a variety of quartz named for its soft, delicate pink hue.

RUBY

Ruby is the most prized variety of the corundum mineral family, which also includes sapphire.

SAPPHIRE

The name "sapphire" refers to any corundum gemstone that isn’t ruby, another variety of corundum.

SPINEL

The Black Prince’s Ruby and the Timur Ruby—spinel, the great imposter, has long been mistaken for ruby in Europe’s crown jewels.

SUNSTONE

Sunstone's exceptional varieties display a vibrant, shimmering effect known as aventurescence.

TANZANITE

Balancing between deep blue, vivid violet, and rich purple, rare tanzanite is found only near the majestic Mount Kilimanjaro.

TOPAZ

Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.

TOURMALINE

Tourmalines boast an incredible array of colors, offering one of the widest color ranges of any gemstone.

TURQUOISE

Azure sky and robin’s egg blue—turquoise’s striking shades give name to this iconic color.

ZIRCON

Zircon is a vibrant gemstone with brilliant fire and high refraction, often mistakenly confused with cubic zirconia.

GRSI’s Guide to Gemstones: Gem Encyclopedia

PERIDOT

Found in lava, meteorites, and deep within the Earth's mantle, yellow-green peridot is a gem of extraordinary origins.

AMBER

Amber is nature’s time capsule, preserving traces of ancient life within its fossilized tree resin for millions of years.

ALEXANDRITE

Green in sunlight, red in lamplight—alexandrite’s stunning color change is nature’s very own magic trick.

AMETHYST

Amethyst, the essence of purple, is stunning enough for crown jewels yet affordable for class rings.

AMETRINE

This transparent quartz displays the hues of both amethyst and citrine, earning it the name ametrine.

AQUAMARINE

Named after seawater, aquamarine's serene blue hue is like a refreshing plunge into crystal-clear waters.

CITRINE

Citrine is a transparent quartz variety, ranging in color from pale yellow to brownish orange.

DIAMOND

Diamonds are one of nature’s most exquisite and treasured creations.

FANCY COLOR DIAMOND

Found in lava, meteorites, and deep within the Earth's mantle, yellow-green peridot is a gem of extraordinary origins.

EMERALD

Emerald is the green to bluish-green variety of beryl, the same mineral family as aquamarine.

GARNET

Garnets are a group of closely related minerals, offering gemstones in nearly every color.

IOLITE

Legend has it that Vikings used iolite slices to cut glare while navigating by the sun.

JADE

"Jade" is a broad term for nephrite, jadeite, and, in some cases, green omphacite. In China, a pierced jade disk symbolizes heaven.

KUNZITE

Collectors cherish kunzite for its stunning color spectrum, ranging from soft pastel pink to vibrant violetish purple.

LAPIS LAZULI

Lapis is a stunning rock composed of multiple minerals, primarily lazurite, calcite, and pyrite.

MOONSTONE

A mystical glow drifts beneath the surface of this feldspar, resembling moonlight shimmering on water.

MORGANITE

Morganite is the pink to orange-pink variety of beryl, the same mineral family as emerald and aquamarine.

OPAL

Fireworks, jellyfish, galaxies, lightning—opal’s mesmerizing play of colors is truly one of a kind.

PEARL

Perfectly radiant spheres, lustrous baroque shapes, and alluring strands—pearls are nature’s purest organic gems.

ROSE QUARTZ

Rose quartz is a variety of quartz named for its soft, delicate pink hue.

RUBY

Ruby is the most prized variety of the corundum mineral family, which also includes sapphire.

SAPPHIRE

The name "sapphire" refers to any corundum gemstone that isn’t ruby, another variety of corundum.

SPINEL

The Black Prince’s Ruby and the Timur Ruby—spinel, the great imposter, has long been mistaken for ruby in Europe’s crown jewels.

SUNSTONE

Sunstone's exceptional varieties display a vibrant, shimmering effect known as aventurescence.

TANZANITE

Balancing between deep blue, vivid violet, and rich purple, rare tanzanite is found only near the majestic Mount Kilimanjaro.

TOPAZ

Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.

TOURMALINE

Tourmalines boast an incredible array of colors, offering one of the widest color ranges of any gemstone.

TURQUOISE

Azure sky and robin’s egg blue—turquoise’s striking shades give name to this iconic color.

ZIRCON

Zircon is a vibrant gemstone with brilliant fire and high refraction, often mistakenly confused with cubic zirconia.

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