ok... so it is probably a crystalline quartz; how is it

来源: panzerkom 于 2009-05-22 13:33:16 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (232 bytes)
本帖于 2009-05-23 06:32:53 时间, 由普通用户 千帆舞 编辑

different from other amethysts you got? if it's just the color, that would still put it in the same family as amethysts.

another thing you can do is to test its surface hardness by trying to scratch a piece of glass with it

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