calcedony 中文意思是什麼
calcedony
解釋
n. 名詞 【礦物】玉髓。-
The jade is rubed the hardness is 6 with zhengdong. 5 - 6. 9, can not be carved with the steel knife, the malachite similar to hardness of other malachite is emerald, nanyang jade, calcedony, etc.
和闐玉摩氏硬度為6 . 56 . 9 ，用鋼刀刻不動，與其它玉石硬度相近的玉石有翡翠南陽玉玉髓等。
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