CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: EASY way on Corundum family?
PostPosted: Mon Dec 06, 2010 10:09 pm 
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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


Last edited by zen on Tue Dec 07, 2010 9:31 pm, edited 1 time in total.

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 Post subject: Re: EASY way on Corundum family?
PostPosted: Tue Dec 07, 2010 4:05 am 
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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

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 Post subject: Re: EASY way on Corundum family?
PostPosted: Wed Dec 08, 2010 11:06 am 
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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)

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 Post subject: Re: EASY way on Corundum family?
PostPosted: Wed Dec 08, 2010 9:20 pm 
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old indian word for 20-30 yard accuracy on a moose at 100 yards......

vegitarian


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 Post subject: Re: EASY way on Corundum family?
PostPosted: Thu Dec 09, 2010 4:10 am 
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I'm just glad there's 2 letters missing...eh! :smt085

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 Post subject: Re: EASY way on Corundum family?
PostPosted: Fri Dec 10, 2010 12:35 am 
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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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