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Garnet
Chamotte
Jasper
Andalusite
Feldspar
Silica, natural
Silica, natural, granulated
Silica, natural, powdered
Flint or chert
Diatomite, kieselguhr/tripolite
Cristobalite
Corundum
Augite
Agate and onyx
Hornblende
Olivine
Rock crystal
Sillimanite/fibrolite
Vermiculite
Emery
Diamonds, bort, carbonados
Diamonds, coloured, rough
Diamonds, colourless, rough
Emeralds, rough
Garnets, rough
Jade, rough
Lapis lazuli (lazurite), rough
Malachite, rough
Moonstones, rough
Opals, rough
Peridot, rough
Rubies, rough
Sapphires, rough
Spinel, rough
Tanzanite, rough
Topaz, rough
Tourmaline, rough
Turquoise, rough
Zircon, rough
Chrysoberyl, rough
Citrine, rough
Beryl, rough
Aquamarines, rough
Amethysts, rough
Amber, rough
Alexandrite, rough
Mica, raw
Quartz
Mica, processed
