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Benitoite.
Beryl.
Beryllonite.
Bloodstone, see Quartz.
Bone Turquoise, see Odontolite.
Bort, see Diamond.
Bottle stone, see Obsid­ian.
Bowenite, see Serpen­tine.
Brazilian diamond, see Quartz.
Brazilian emerald, see Tourmaline.
Brazilian pebble, see Quartz.
Bronzite.
Brookite.
Cacholong, see Opal.
Cairngorm, see Quartz.
Calcite, see Carbonate of Lime.
Callainite, see Turquoise.
Cancrinite.
Carbonado, see Diamond.
Carbuncle, see Garnet.
Carnelian, see Quartz.
Cassiterite.
Catlinite.
Ceylonite, see Spinel.
Chalcedony, see Quartz.
Chiastolite, see Andalu-site.
Chlorastrolite, see Preh-nite.
Chloromelanite, see Jade.
Chlorophane, see Pluo-rite.
Chlorospinel, see Spinel.
Chondroite.
Chromic iron.
Chrysoberyl.
Chrysocolla.
Chrysolite, see Olivine.
Chrysolite (Oriental), see Chrysoberyl.
Chrysoprase, see Quartz.
Cinnamon stone, see Gar­net.
Citrine quartz, see Quartz.
Coal.
Cobaltite.
Cobrastone, see Fluorite.
Colophonite, see Garnet.
Congo emerald, see Diop-tase.
Coral, see Carbonate of Lime.
Cornelian, see Quartz.
Corundum.
Crocidolite.
Cymophane, see Chryso­beryl.
Cyprine, see Vesuvianite.
Damourite.
Datolite.