Gem

Gem can refer to any of the following:

Uncut gemstones

 * Uncut sapphire
 * Uncut emerald
 * Uncut ruby
 * Uncut diamond
 * Uncut dragonstone

Cut gemstones

 * Sapphire
 * Emerald
 * Ruby
 * Diamond
 * Dragonstone

Other

 * Gem rock