noun
chrysocolla
A blue-green copper silicate mineral, often used as a gemstone or ornamental stone.
珪孔雀石は美しい青緑色の鉱物です。
Chrysocolla is a beautiful blue-green mineral.
From 珪 (けい, 'silicon') + 孔雀石 (くじゃくせき, 'malachite'), referring to its chemical similarity to malachite but containing silicon.