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 Post subject: synthetic sphene?
PostPosted: Tue Nov 14, 2006 10:32 am 
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As some have seen
I love my sphene
Brilliance that there's never been

Okay, enough rhyming. Anyone else ever heard of synthetic sphene? First, why would anyone produce it? Second, could this actually be strontium titanite? Anyone have a clue?

See

http://cgi.ebay.com/11ct-UNBELIEVABLE-D ... dZViewItem


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 Post subject:
PostPosted: Tue Nov 14, 2006 10:52 am 
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Location: San Francisco
Hi
Write them and ask them what it is.


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 Post subject:
PostPosted: Tue Nov 14, 2006 7:29 pm 
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Hi all,
I have had in my hand what I think is this material.... It was CZ.

CC


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 Post subject:
PostPosted: Wed Nov 15, 2006 9:32 am 
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No answer from the seller. I've seen "sphene" quartz but never anything that claimed to be synthetic sphene. CZ does seem to be the consensus. If I hear different from the seller, I'll post.


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 Post subject:
PostPosted: Wed Nov 15, 2006 10:27 am 
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Without seeing and testing the stone it's hard to guess. The most dispersive man-made stone I've ever seen is synthetic rutile which was marketed years ago as Titania. I know the Russians are making it, and doping it to green (or another) body color proably wouldn't be a big trick.

Other high-dispersion diamond simulants available from Russian labs include strontium titanite, as mentioned; lithium niobate ("linobate,") and lithium tantalite. YAG also could be a candidate, and it's already available in several colors.

Rick Martin


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 Post subject:
PostPosted: Tue Nov 21, 2006 9:53 am 
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Classy Carat and others were correct. I finally heard from the seller and he was marketing sphene-colored CZ as simulated sphene.


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