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Posted in response to Re: Unknown Mineral from Adelaide on September 13, 2011 at 03:23:45:

Re: Re: Unknown Mineral

Looks like a quartz stream pebble to me. Feldspar doesn't very often appear as rounded stream pebbles both because compared to quartz, feldspar's extreme cleavage makes it very subject to mechanical breakdown, and it is also very subject to chemical breakdown; compared to quartz.

Becky

From Becky Kelher - September 13, 2011 at 14:48:22
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Message: 69954



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