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Posted in response to Unknown Mineral from Randy J. Sronce on September 11, 2011 at 02:05:08:

Re: Unknown Mineral

It is very easy to distinquish quartz from feldspar, BTW.

Quartz will easily scratch glass, feldspar is too soft to do so.

Becky

From Becky Kelher - September 13, 2011 at 14:48:52
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Message: 69956



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