PRECIOUS STONES.
ARRANGED ACCORDING TO COLOR AND IN ORDER OF HARDINESS.
Limpid.—Diamond, Sapphire, Topaz, Rock-Crystal.
Blue.—Sapphire, Topaz, Indicolite, Turquoise, Spinel, Aquamarine, Kaynite.
Green.—Oriental Emerald, Chrysoberyl, Amazon Stone, Malachite, Emerald, Chrysoprase, Chrysolite.
Yellow.—Diamond, Topaz, Fire-Opal.
Red.—Sapphire-Ruby, Spinel-Ruby, Rubellite, Garnet, Brazilian-Topaz, Hyacinth, Carnelian.
Violet.—Oriental-Amethyst, Amethyst.
Black and Brown.—Diamond, Tourmaline, Hyacinth, Garnet.