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Posted in response to Re: Re: Confused from Bill on December 14, 2007 at 08:01:53:

Re: Re: Re: Confused

Hi again Bill,

Without some further tests as to the hardness, streak, specific gravity and so forth I can't say with any degree of certainty if you have corundum (sapphire) crystals there or not. However, the larger specimen in particular exhibits obvious hexagonal structure and is quite similar in appearance to some other specimens known to be corundum.

Where did you dig them? (A fee dig somewhere in Montana?) If the locality is known for corundum, that also helps with the confidence of an ID, although a good deal of salting with alien material goes on at many fee dig sites...

Based on the picture alone I don't see anything that would rule out corundum. Corundum is a good deal harder than other common minerals in the hexagonal crystal system that it might be, so if you can conduct a hardness test, or know someone who can, that would go a long way towards confirming it to be corundum.

Keep on Rock'n!

From Bob Keller - December 14, 2007 at 13:55:19

Message: 65705

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Bob Keller