請選擇 進入手機版 | 繼續訪問電腦版
 找回密碼
 立即註冊
查看: 288|回復: 0

Jadeite is a pyroxene mineral with composition NaAlSi2O6

[複製鏈接]

1萬

主題

2萬

帖子

7萬

積分

論壇元老

Rank: 8Rank: 8

積分
75221
發表於 2023-3-31 08:22:54 | 顯示全部樓層 |閱讀模式
Jadeite is a pyroxene mineral with composition NaAlSi2O6. It is hard (Mohs hardness of about 6.5 to 7.0), very tough, and dense, with a specific gravity of about 3.4. It is found in a wide range of colors, but is most often found in shades of green or white. Jadeite is formed only in subduction zones on continental margins, where rock undergoes metamorphism at high pressure but relatively low temperature.

Jadeite is the principal mineral making up the most valuable form of jade, a precious stone particularly prized in China. Most gem-quality jadeite jade comes from northern Myanmar. Jade tools and implements have been found at Stone Age sites, showing that the mineral has been prized by humans since before the beginning of written history.
(https://en.wikipedia.org/wiki/Jadeite)
/03 2023
回復

使用道具 舉報

您需要登錄後才可以回帖 登錄 | 立即註冊

本版積分規則

快速回復 返回頂部 返回列表