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

來源: panzerkom 於 2009-05-22 13:33:16 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (232 bytes)
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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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