The name of natural jade directly uses the basic name of natural jade or its mineral (rock) 名前. 言葉 "玉" can be appended to the name, without the word "自然". のような: "エメラルド", "蛇紋岩の翡翠", which refers to natural "ジェイド" そして "蛇紋岩の翡翠". しかし "天然ガラス" is excluded. 認識しなければならないのは: [...]
