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 Post subject: Identification
PostPosted: Sat Jun 27, 2020 7:00 pm 
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I use to be pretty good at identifying crystals/gen stones, but I have some I cannot identify. They seem to appear like several different one in the book I have. Could someone help me with them?
Sorry for so many images but my knowledge is not as tuned as it use to be.


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 Post subject: Re: Identification
PostPosted: Sat Jun 27, 2020 11:17 pm 
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Posts: 932
Those are not crystals. They are tumbled stones with none of the crystal faces left if they ever even had any.

If you think you were good at identify stones like these by their crystal shapes you have been kidding yourself.


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 Post subject: Re: Identification
PostPosted: Sun Jun 28, 2020 12:22 am 
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Location: San Francisco
Crystals, nope.
Tumble polished stones, yes.

Perhaps this will help:
Visual observation...
https://rocktumbler.com/polished-stones/
and


If you still have unknowns, go pro...
http://www.minsocam.org/msa/collectors_ ... _keyi1.htm


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 Post subject: Re: Identification
PostPosted: Sun Jun 28, 2020 8:15 pm 
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Yes, I know this. But they are tumbled versions of their forms. I just thought someone here would know what they are. I have a number of books but find either no matches or multiple possible ones.


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 Post subject: Re: Identification
PostPosted: Sun Jun 28, 2020 11:22 pm 
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Looks like you may have to Go Pro and do some actual testing on the unknowns.
Tumbled stones did not typically start as crystals. Often tumbled stones are massive. Agates, jaspers, chalcedony do not form xls.

This one is a banded agate (most probably dyed):
Image

You might consider bringing them to your closest gem and mineral club once we can leave the house again.


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 Post subject: Re: Identification
PostPosted: Tue Jun 30, 2020 8:31 pm 
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Yeah, in the hand I could probably id most of them. Those photos make it hard. There is a jasper, though. :-D


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