CIBJO releases Gemmological Special Report: considers process of separating measurable facts from opinion; See Gemological Articles below.
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 Post subject: Inclusions in Red Stone
PostPosted: Sat Jul 27, 2013 5:09 pm 
This stone has RI 1.705 and SG 4.09. I think it is a Garnet. In photo "inclusions 2" we can see enlarged inclusions and in photo "inclusions 3" there is one triangular (in the white cycle). Can it be triangular platinum crystals of Pulled synthetics ? In photo "inclusions 4" we can see curve striae. Are there synthetic Garnets or the stone is not a Garnet ?

Thanks


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Sat Jul 27, 2013 6:51 pm 
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That last picture is polishing marks on the surface, not curved straie inside.


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Sun Jul 28, 2013 4:41 am 
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the 1st and 2nd pictures shows something looking natural to me.
3rd, as Julie said, are surface scratches/lines likely due to bad polishing...........

ciao
alberto

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 Post subject: Re: Inclusions in Red Stone
PostPosted: Sun Jul 28, 2013 7:25 am 
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With a RI at 1.705 it is very unlikely that the stone be a garnet. Or did you mean 1.750 ?


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Sun Jul 28, 2013 5:18 pm 
"That last picture is polishing marks on the surface, not curved straie inside."


Julie , thanks for your information because I have many stones with this marks and i though it was curved straie.


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Sun Jul 28, 2013 5:27 pm 
"With a RI at 1.705 it is very unlikely that the stone be a garnet. Or did you mean 1.750 ?"

Isi, hi
I am not gemologist. I studied agriculturalist. It is 1.705 and i said Garnet, because i read it on "Refractive Idex Reference Chart" of the company i bought my Refractometer. It says 1.696 to 2.030 for general Garnet.


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Mon Aug 05, 2013 3:24 pm 
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Too low for garnet, pyrope garnets typically start at 1.714, but since they almost always form w/ almandine, you typically see these reddish pyrope/almandine ~1.74ish or higher (more like 1.77) inclusions look natural, but unless the reading was incorrect... the hunt continues


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 Post subject: Re: Inclusions in Red Stone
PostPosted: Tue Aug 06, 2013 10:20 am 
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Judging from inclusions, surface condition and facet junctions, coloration, and data you supplied, look towards Willemite as a possibility. Not commonly seen faceted, but the inclusions are possible, brittle so facet junctions being abraded are likely, etc.

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