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auProspector
Joined: 12 Apr 2025
Posts: 2
Location: FNQ
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 Posted: Apr 12, 2025 10:03 Post subject: Help Identifiying: Moonstone? |
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Found this in an old box laying around with bits/pieces that had belonged to my grandmother. No idea on it's origins/where it came from.
Closest thing I could find by googling is perhaps a tumbled/polished Moonstone? In natural light it kind of has a slight rainbow sheen to it, but mainly purple/blue/green/orange depending on angle and lighting. Weighs about 14 grams / 70 ct.
Any ideas?
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Padego
Joined: 04 Mar 2025
Posts: 3
Location: Victoria, BC
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| Posted: Apr 12, 2025 10:10 Post subject: Re: Help Identifiying: Moonstone? |
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| This appears to be opalescent glass, you should take it to a local gemmologist to be absolutely sure.
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Riccardo Modanesi
Joined: 07 Nov 2011
Posts: 631
Location: Milano
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| Posted: Apr 15, 2025 02:02 Post subject: Re: Help Identifiying: Moonstone? |
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Hi to everybody!
As a gemmologist I can say it is a glass! Veils and gas bubbles are evident inside there! But some synthetic spinels take this opalescence effect and are made to imitate moonstone!
Greetings from Italy by Riccardo.
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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo. |
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auProspector
Joined: 12 Apr 2025
Posts: 2
Location: FNQ
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| Posted: Apr 15, 2025 03:30 Post subject: Re: Help Identifiying: Moonstone? |
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| Riccardo Modanesi wrote: | Hi to everybody!
As a gemmologist I can say it is a glass! Veils and gas bubbles are evident inside there! But some synthetic spinels take this opalescence effect and are made to imitate moonstone!
Greetings from Italy by Riccardo. |
Yep, thanks for the confirmation to you and Padego -- definitely just opalescent glass! I wasn't too familiar with it before but no doubt that's what this is. Oh well, good to know for sure anyhow!
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Roger Warin
Joined: 23 Jan 2013
Posts: 1233
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| Posted: Apr 15, 2025 08:08 Post subject: Re: Help Identifiying: Moonstone? |
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| If it were a moonstone (collected by gemologists), it would be a rock made of a mixture of orthoclase and albite. At this point, it is enough to check whether this sample has cleavage. The optical phenomenon is called adularescence. In a cabochon, it would produce a central band of iridescence.
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