noun
A calcium-iron garnet mineral. Technical term used in mineralogy and gemology.
灰鉄柘榴石はカルシウムと鉄を含む柘榴石の一種です。
Andradite is a type of garnet containing calcium and iron.
柘榴石 is the general term for garnet, while 灰鉄柘榴石 specifically refers to the andradite variety.
Compound of 灰 (かい, 'ash', here referring to calcium), 鉄 (てつ, 'iron'), and 柘榴石 (ざくろいし, 'garnet'). The name reflects its chemical composition.