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Id stone
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=100&t=25235
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Author:  Tirre [ Wed Jun 19, 2019 6:22 pm ]
Post subject:  Id stone

Hi please help id gems in brooch
They could scratch glass
Have fluorescence yellow in UV became green
Pink in UV became blue

Attachments:
IMG_20190518_181248.jpg
IMG_20190518_181248.jpg [ 2.68 MiB | Viewed 2026 times ]

Author:  Barbra Voltaire, FGG [ Wed Jun 19, 2019 9:13 pm ]
Post subject:  Re: Id stone

Would you kindly take a picture of the back of the pin?
The solid backs visible where the stones are missing suggest probable foil backing.
I suspect foil backed glass.

Author:  Tirre [ Thu Jun 20, 2019 3:52 am ]
Post subject:  Re: Id stone

Barbra Voltaire wrote:
Would you kindly take a picture of the back of the pin?
The solid backs visible where the stones are missing suggest probable foil backing.
I suspect foil backed glass.


Attachments:
IMG_20190519_155248.jpg
IMG_20190519_155248.jpg [ 1.12 MiB | Viewed 1993 times ]

Author:  Tirre [ Thu Jun 20, 2019 3:54 am ]
Post subject:  Re: Id stone

Barbra Voltaire wrote:
Would you kindly take a picture of the back of the pin?
The solid backs visible where the stones are missing suggest probable foil backing.
I suspect foil backed glass.


Attachments:
File comment: Is NOT glass it easy scratch glass and have fluorescence
IMG_20190524_173113.jpg
IMG_20190524_173113.jpg [ 1.21 MiB | Viewed 1993 times ]

Author:  Isi [ Thu Jun 20, 2019 9:55 am ]
Post subject:  Re: Id stone

The type of cutting, the setting metal and the general luminosity certainly suggest fancy cut glass. Kind of costume jewelry.

Author:  Barbra Voltaire, FGG [ Thu Jun 20, 2019 6:36 pm ]
Post subject:  Re: Id stone

Isi and I are in agreement.

Author:  Duncan Miller [ Fri Jun 21, 2019 3:19 am ]
Post subject:  Re: Id stone

Glasses range widely in composition and hence hardness, so that fact that these stones scratch glass is not proof that they cannot be glass. Depending on composition glass can be fluorescent. Look for swirl marks and bubbles, under magnification.

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