_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.