GemologyOnline.com
https://www.gemologyonline.com/Forum/phpBB2/

Mystery stone
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=6&t=25223
Page 1 of 1

Author:  Barbra Voltaire, FGG [ Tue Jun 11, 2019 10:26 pm ]
Post subject:  Mystery stone

I got an email today from someone asking me for an ID for a stone.
I dunno :|

Anyone have an idea?
Image
Image

Author:  Duncan Miller [ Wed Jun 12, 2019 12:00 pm ]
Post subject:  Re: Mystery stone

Low quality amber, or perhaps an amber simulant?

Author:  Isi [ Fri Jun 14, 2019 10:23 am ]
Post subject:  Re: Mystery stone

Amber would be my first guess too.
Might be amber amber made of several pieces of amber pressed together. Very common.
How does it react to a hot needle ? Provided that you can try in an hidden place of the material.

Author:  JCD [ Fri Jun 14, 2019 2:49 pm ]
Post subject:  Re: Mystery stone

When I saw it my first thought was brecciated jasper or maybe dino bone.

Can you remove the stone for testing? Looks like it might be glued in as the bezel is not over the stone.

Jim

Author:  1bwana1 [ Fri Jun 14, 2019 7:46 pm ]
Post subject:  Re: Mystery stone

Looks like amber to me as well.

Author:  JCD [ Sun Jun 16, 2019 1:49 pm ]
Post subject:  Re: Mystery stone

You guys really think it looks like amber? I always thought amber was translucent.
Anyone have an example that looks like the stone in question?

Thanks, Jim

Author:  offimatrix [ Sun Jun 16, 2019 4:06 pm ]
Post subject:  Re: Mystery stone

Hard to say.

Ivar. Yellow yolk amber or could be yellow jasper,

Could be any of them :/

yellow jasper
Attachment:
il_fullxfull_709112718_9x0h.jpg
il_fullxfull_709112718_9x0h.jpg [ 74.92 KiB | Viewed 637 times ]


Yellow yolk amber
Attachment:
Untitled-1 copy.jpg
Untitled-1 copy.jpg [ 373.11 KiB | Viewed 637 times ]

Author:  Stephen Challener [ Sun Jun 16, 2019 4:18 pm ]
Post subject:  Re: Mystery stone

For the record, I don't think the example above is actually yellow jasper. Those flow lines do not look like patterning you'd expect to see in jasper, or almost any natural material.
Also definitely not dino bone or brecciated jasper.

Author:  offimatrix [ Sun Jun 16, 2019 4:32 pm ]
Post subject:  Re: Mystery stone

Stephen Challener wrote:
For the record, I don't think the example above is actually yellow jasper. Those flow lines do not look like patterning you'd expect to see in jasper, or almost any natural material.
Also definitely not dino bone or brecciated jasper.


I did google Yellow Jasper rings and some are like that, Then again I don't know if
there been enhanced in some way as you don't know now adays, Many do have flow lines as you say.

Id say ring could be egg yolk amber tbh. but that's my thought with googling
cab rings, Thought i'd try and help.

egg yolk amber.
Attachment:
silver-brooch-butterscotch-egg-yolk-amber.jpg
silver-brooch-butterscotch-egg-yolk-amber.jpg [ 6.63 KiB | Viewed 631 times ]

Author:  JCD [ Sun Jun 16, 2019 4:48 pm ]
Post subject:  Re: Mystery stone

Thanks offimatrix, egg yolk amber is a first for me, that's definitely the most opaque amber I've ever seen.

Maybe Barbra could try the rub test on the piece and see if there is any odor.

Thanks, Jim

Author:  Isi [ Mon Jun 17, 2019 9:23 am ]
Post subject:  Re: Mystery stone

Actually, most baltic amber is opaque before it is heated to make it translucent.

And Stephen, I don't think, either, 2 of the 3 pictures posted by Offimatrix are 1/ jasper 2/ amber.

Author:  Barbra Voltaire, FGG [ Mon Jun 17, 2019 12:18 pm ]
Post subject:  Re: Mystery stone

Quote:
Maybe Barbra could try the rub test on the piece and see if there is any odor.

Thank you, JCD for your confidence in my nose...... cough cough.

Couple things could be done.
I hope the guy who sent me the email is following the thread.
Hot point, as mentioned earlier, would seperate from plastics or stone.

A good rub might generate some diagnostic piezoelectricity.
Rub, rub rub with wool, silk or cotton and see if the unknown attracts small bits of ashes or paper cut into wee bits.

Wikipedia wrote:
Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins)in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived from the Greek word πιέζειν; piezein, which means to squeeze or press, and ἤλεκτρον ēlektron, which means amber, an ancient source of electric charge. French physicists Jacques and Pierre Curie discovered piezoelectricity in 1880.

Author:  Isi [ Mon Jun 17, 2019 3:31 pm ]
Post subject:  Re: Mystery stone

Sure, but many plastics have the same property.

Author:  Barbra Voltaire, FGG [ Wed Jun 19, 2019 2:28 pm ]
Post subject:  Re: Mystery stone

A hot point would seperate plastic from pine sap.

Page 1 of 1 All times are UTC - 4 hours
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/