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Posted in response to Re: Re: Unknown Mineral from Adelaide on September 15, 2011 at 05:43:16:

Re: Re: Re: Unknown Mineral

Hi Adelaide,

You are correct of course, feldspar at 6 will scratch glass. (As of course, will quartz at 7). Most glass is around 5 1/2.

Will have to plead a "senior moment".

Still stand by the ID of his pebble as quartz, feldspar should show some evidence of gleavage surfaces.

Becky

From Becky Kelher - September 17, 2011 at 00:39:51
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Message: 69960



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