A type of precious [[crystal]] [[gem|gemstone]] known for its hardness.

For tagging purposes this should be used for crystals that have been cut into an organized shape, particularly a shape used in jewelry.

For the ♦️ symbol or the [[playing card]] suit, use [[diamond (shape)]].
For the 💎 symbol seen on [[Idolmaster]] character cards, see [[gem (symbol)|]].
ダイヤモンド 다이아몬드 钻石