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EASY way on Corundum family?
https://gemologyonline.com/Forum/phpBB2/viewtopic.php?f=13&t=12880
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Author:  zen [ Mon Dec 06, 2010 10:09 pm ]
Post subject:  EASY way on Corundum family?

Dear Guys,

Beside using a loupe, is there any way to identify the corundum family? (synthetic, treated and real). Is it possible? I know it is not so straight forward and one have to undergo a series of test before the conclusion can be made. But for me, I am happy with a 70 ~ 80% of accuracy. Will UV-VIS-NIR, FTIR or raman show anything? Thank you.



Regards,
zen

Author:  Alberto [ Tue Dec 07, 2010 4:05 am ]
Post subject:  Re: EASY way on Corundum family?

zen wrote:
Dear Guys,

Beside using a loupe, is there any way to identify the corundum family? (synthetic, treated and real). Is it possible?


yeah, by using a refractometer.

ciao
alberto

Author:  Conny Forsberg [ Wed Dec 08, 2010 11:06 am ]
Post subject:  Re: EASY way on Corundum family?

zen wrote:
...I am happy with a 70 ~ 80% of accuracy.


Why even bother with that "accuracy"? For me it would be like hitting within 20-30 yards when shooting at a Moose, at 100 yards... (I'm a keen believer in 0.5 (or less) MOA rifles)

Author:  stairman [ Wed Dec 08, 2010 9:20 pm ]
Post subject:  Re: EASY way on Corundum family?

old indian word for 20-30 yard accuracy on a moose at 100 yards......

vegitarian

Author:  mehoose [ Thu Dec 09, 2010 4:10 am ]
Post subject:  Re: EASY way on Corundum family?

I'm just glad there's 2 letters missing...eh! :smt085

Author:  Bill Hanneman [ Fri Dec 10, 2010 12:35 am ]
Post subject:  Re: EASY way on Corundum family?

zen wrote:
But for me, I am happy with a 70 ~ 80% of accuracy.


Try scratching it. Not many minerals have a Mohs hardness of 9.

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