noun
chrysoprase
A green variety of chalcedony used as a gemstone. Technical term in mineralogy and jewelry.
緑玉髄は、その美しい緑色で知られる宝石です。
Chrysoprase is a gemstone known for its beautiful green color.
From 緑 (green) + 玉髄 (chalcedony). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.