Gemstones

Alexandrite (chrysoberyl)

Aquamarine (beryl)

Amethyst

Diamond

Emerald

Garnet

Iolite

Jade

Kunzite

Lapis lazuli

Moonstone (Feldspar)

Malachite

Obsidian

Opal (Girasol)

Quartz and its varieties

Ruby

Sapphire

Sunstone

Zeolite (Thomsonite)

Organic materials used as gems

Amber

Ivory

Pearl