Opal is a multi-coloured mineraloid popular as ornamentation.
Gold • Silver
Amethyst • Beryl • Carnelian • Chalcedony • Diamond • Emerald • Garnet • Jade • Jasper • Malachite • Moonstone • Onyx • Ruby • Sapphire • Tiger's Eye • Topaz • Tourmaline
Amber • Coral • Ivory • Jet • Pearl
Lapis Lazuli • Obsidian • Opal