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A diamond trapped in glass


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Hi Guys,

My friend is an experienced glassblower and i wanted him to make me a Diamond put in glass to be set on a ring for my wife,  but he says its impossible and they would offgases, burn off and get destroyed in the intense heat of the process ... 
As i understand,  about nothing withstand the process of insertion into glass,  but only the things closest as possible to pure sillicium would survive, and he says some high temp CZ would do..

But i found these guys :  https://diamondsinglass.com/
they are out of stock on everything, i called and it could be a while before i get a chance to get something, they seems to have some problems...
my buddy also told me they might not be real diamond but either pure Lab-Grown, CZ, quarts, or others..   ( but on their website they says it with come a lab certificate ? GS )

since they are trapped in glass and there is no way of verifying the origin of the diamond,  I'm curious what are your guys though on this ?


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Couple of points to bear in mind:

1. A 0.20 - 0.24 ct H-I I1 diamond (their openly declared spec) is priced retail at about $150-200 including $50 of lab report (if you could find one with a report... the vast majority of stones of this spec are sold without report). As such, I wouldn't be too worried whether the diamond is real or not.

2. How they do it I don't know, but while traditional silica glass is worked at around 1000 C, which is way above a typical "safe" temperature for diamonds (<800 C), there are plenty of glasses that can be worked at much lower temperatures. Fracture filling is a diamond treatment that injects a glass-like compound with a low(ish) working temperature into a fracture in a diamond in the hope of making the imperfection less visible. It works, and it has been in use for several decades, so this process just seems like an extension of that.

3.  What is the point of encasing something extremely hard and durable into a compound that is far less hard and resistant to shocks, scratches and bumps? 

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From their advertisement:

“Working with a unique hybrid form of glass that is resistant to acid, heat, and bubble formation, Diamonds in Glass® artisans use a proprietary technology to create a perfect globe housing a single magnificent diamond in virtually unbreakable glass. The special glass magnifies the brilliance, scintillation, and sparkle of the diamond so that it appears triple its dimension."


This is a little heavy on the techno-babble for my taste, but there's nothing fundamentally wrong with it.  I see no reason to think it's not possible with the right glass recipe and the right tools.  FWIW, it does look difficult but the key is in that 'proprietary technology', i.e. the right tools. 

I think most GS inspections involve a laser inscription on the stone that you should be able to see through the glass under magnification. This could be done on a fake too, but as Davide points out above, it's quite a chore to fake a stone that wouldn't be all that expensive anyway. Is there some reason you're suspecting shenanigans? 

Edited by denverappraiser
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