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Laboratoire Gem Quebec
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Educational
Radioactivity information
Amethyst
Aquamarine
Citrine
Diamond
Emerald
Malachite
Moonstone
Peridot
Pearl
Quartz
Ruby
Sapphire
Spinel
Tanzanite
Topaz
Garnet
Opal
Tourmaline
Zircon
Rarity and Varieties
Diagram – Standard round Brilliant
Diagram – Standard Brilliant cushion
Diagram – Standard brilliant pear
Diagram – Standard brilliant oval
Diagram – Standard brilliant marquise
Scheme – Standard Brilliant Emerald
Clarity grade
Grade of tone
Color grade
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