Commodity
Gem materials
Gem materials include such naturally occurring transparent minerals as tanzanite, beryl (emerald and aquamarine), spinel, tourmaline, peridot, garnet, topaz, and amethyst, as well as opaque or translucent minerals such as lapis lazuli, jade, opal, turquoise, and malachite. The category also includes such organic materials as pearls and coral.
Diamonds, Corundum (ruby and sapphire), ivory, and amber are separate Commodity entries.