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Gemstone Knowledge Center

Gem profiles, cut diagrams and resources for gemstone enthusiasts

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Radioactive material warning symbol – Gem radioactivity safety guide – Laboratoire Gem Quebec
Red cushion cut ruby - Traditional precious stones guide diamond sapphire emerald - Lab Gem Quebec
Blue violet tanzanite gemstone – Distinctive gemstones guide – Laboratoire Gem Quebec
Light blue aquamarine gemstone – Fine stones and crystals guide – Laboratoire Gem Quebec

Gem Radioactivity

Safety, identification, treatment detection

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Safety protocols and analysis for radioactive minerals – Laboratoire Gem Quebec

Safety Guide

Traditional Precious Stones

Diamond, Sapphire, Ruby, Emerald

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Distinctive Gemstones

Opal, Spinel, Tanzanite, Tourmaline, Garnet, Zircon

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Fine Stones & Crystals

Amethyst, Aquamarine, Citrine, Peridot, Quartz, Topaz

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Traditional Precious Stones

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Diamond brilliance and fire – Diamond guide – Laboratoire Gem Quebec

Diamond

Natural red ruby – Ruby guide – Laboratoire Gem Quebec

Ruby

Blue sapphire – Sapphire guide – Laboratoire Gem Quebec

Sapphire

Natural emerald – Emerald guide – Laboratoire Gem Quebec

Emerald

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Opal

Opal play of color – Opal guide – Laboratoire Gem Quebec

Garnet

Garnet varieties – Garnet guide – Laboratoire Gem Quebec

Distinctive Gemstones

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Spinel

Red spinel gemstone – Spinel guide – Laboratoire Gem Quebec

Zircon

Natural blue zircon – Zircon guide – Laboratoire Gem Quebec

Tanzanite

Blue violet tanzanite – Tanzanite guide – Laboratoire Gem Quebec

Malachite

Green banded malachite – Malachite guide – Laboratoire Gem Quebec

Tourmaline

Tourmaline watermelon – Tourmaline guide – Laboratoire Gem Quebec
Moonstone adularescence – Moonstone guide – Laboratoire Gem Quebec

Moonstone

Fine Stones & Crystals

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Purple amethyst – Amethyst guide – Laboratoire Gem Quebec

Amethyst

Light blue aquamarine – Aquamarine guide – Laboratoire Gem Quebec

Aquamarine

Golden citrine – Citrine guide – Laboratoire Gem Quebec

Citrine

Peridot

Green peridot – Peridot guide – Laboratoire Gem Quebec

Quartz

Quartz varieties – Quartz guide – Laboratoire Gem Quebec

Topaz

Imperial and blue topaz – Topaz guide – Laboratoire Gem Quebec

Additional Resources

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Pearl cultivation in oyster shells - Organic and special gemstones guide Pearl Moonstone Malachite - Lab Gem Quebec

Pearl

Organic Gems

Pearl, Amber, Coral, Mother of Pearl, Jet

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View guides ›

Natural and cultured pearl – Pearl guide – Laboratoire Gem Quebec
Collection of rare gemstones and faceted gem varieties - Guide to corundum garnet opal tourmaline and collector stones - Lab Gem Quebec

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Rare Gems & Varieties

Alexandrite, Padparadscha, Paraíba, Tsavorite and exceptional varieties

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Pink Star diamond – Rare gemstones – Laboratoire Gem Quebec
GIA clarity grading scale – Laboratoire Gem Quebec
Precision gemstone faceting machine - Lapidary cutting guide classic round brilliant - Lab Gem Quebec

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Gem Classification

Classification systems by transparency, tone, saturation and color

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Lapidary Cut Diagrams

Classic cuts: round brilliant, oval, cushion, pear, emerald, marquise

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View guides ›

Classification Guides

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Clarity

Gemstone clarity classification chart – Laboratoire Gem Quebec

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Tone

Gemstone tone and saturation chart – Laboratoire Gem Quebec

Cut Diagrams

Color

Gemstone hue and color guide – Laboratoire Gem Quebec

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Round Brilliant

Pear

Oval

Emerald

   Cushion

Marquise

Round brilliant cut diagram – Laboratoire Gem Quebec
Oval cut diagram – Laboratoire Gem Quebec
Cushion cut diagram – Laboratoire Gem Quebec
Emerald cut diagram – Laboratoire Gem Quebec
Marquise cut diagram – Laboratoire Gem Quebec
Pear cut diagram – Laboratoire Gem Quebec

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