July 11-12:BILLINGS, MONTANA: Annual show; Billings Gem and Mineral Club; Sat. 10-5, Sun. 10-4; Free admission!
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 Post subject: glazed rubies
PostPosted: Thu Oct 02, 2008 9:46 pm 
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Yummie...
It looks like a glazed cram puff, like these. Thay have in common glaze, color and both come from a oven I guess. :)


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PostPosted: Thu Oct 02, 2008 10:44 pm 
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I think it looks as though someone dropped his candy apple! :lol:

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PostPosted: Thu Oct 02, 2008 11:08 pm 
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Neat picture. It appears that flat spot on the right of the stone may be where it was conglomerated to the rest in the batch.

J-

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PostPosted: Fri Oct 03, 2008 3:13 am 
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The description says its heated. Probably a better description would be 'melted'.

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PostPosted: Fri Oct 03, 2008 3:55 pm 
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brimsjewelry wrote:
It appears that flat spot on the right of the stone may be where it was conglomerated to the rest in the batch.

J-


They have quite a lot of that ruby rough, but the one I linked is SO clearly treated, I think it deserves a figure in a manual about heating/glass filling rubies. :)


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PostPosted: Fri Oct 03, 2008 5:14 pm 
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I have some rubies from that vendor. They were cheap, I was curious, so I bought some. I'm trying to figure out what the coating is - right now I have them in acetone, but the coating isn't melting so I have to assume it's glass :?:

It's just my opinion, but I think they tend to overstate the clarity of their stones. The ones I bought were supposed to be "VS-VVS". Some of them have so much silk in them they may star. I think I'll cab one and see what happens.

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PostPosted: Fri Oct 03, 2008 10:32 pm 
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You have samples? That's interesting.
From the pictures only, my guess would be that they have tried to fill cracks, etc. with glass... If you have a sample it should be easier to tell, especially if you cut/cab it.

Of course "nobody" would expect to buy a 8 ct. natural and beautiful red ruby for 49.99$. For a good glass filled ruby maybe it's a good price. The color is really nice, I only hope that stones have some % of ruby, but if you see much rutile probably there's much ruby.

I don't think they've only tried to go to (very) high T to get rid of silk (and melting the surface); the flat base and the surface are really suggesting glass, imho.

Let us know what you find after you cut your stones!


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PostPosted: Fri Oct 03, 2008 10:44 pm 
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I will let you know what happens. I've had these for months...they're real ruby, but they do have a liberal coating of whatever they were burned in. Good color, not so good clarity, but hey, $10 for 50 cts or so was worth it to look. If nothing else, they should cab OK.

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