December 14-16—SAN DIEGO, CALIFORNIA: Wholesale and retail show; Gem Faire Inc.; Scottish Rite Center, 1895 Camino del Rio S; Fri. 12-6, Sat. 10-6, Sun. 10-5
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 Post subject: Stange blue/purple layered gem or stone. No idea.
PostPosted: Thu Oct 11, 2018 3:16 am 
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Need help identifying this as i have tried a jeweler and a geologist with both having no idea and one suggesting it was man made. It was retrieved from a river bed about 6 or so feet down in a clay layer from tasmania near a town named maydena.


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 Post subject: Re: Stange blue/purple layered gem or stone. No idea.
PostPosted: Thu Oct 11, 2018 10:06 am 
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It appears to be a classic blue goldstone, a man-made glass with crystals of copper that give it a sparkling effect. Its shape doesn't look very natural either. I can't say anything for sure from a picture but that's where my money would go. It's amazing how often manmade glass is found in places it seems like it shouldn't occur.


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 Post subject: Re: Stange blue/purple layered gem or stone. No idea.
PostPosted: Fri Oct 12, 2018 9:36 am 
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I have a former student who became a jeweller and once set on gold a man-made glass of that kind (orange version). He had it back from Turkey or Egypt and was convinced it was a sunstone. Looks like he did't benefit much of my gemological teaching #-o
Definitely this stone seems to be the classical night blue version of the man-made aventurescent glass. Look (with a loupe) for the triangular shape of the copper platelets inside.


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