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What type of crystal is this stone? https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=6&t=25852 |
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Author: | dchallener [ Thu Sep 10, 2020 1:27 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Absolutely impossible to tell from picture. 1) Is there a maker's mark? 2) do you know what the side stones are? Other than that - find someone with a Raman Spectrometer. They can tell near instantly. |
Author: | Stephen Challener [ Thu Sep 10, 2020 1:52 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Thry kind of look like they were glued in place and now some have fallen out. There is possibly a bubble visible in the glue too. |
Author: | Barbra Voltaire, FGG [ Thu Sep 10, 2020 2:37 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Looks like a glue glob to me too. |
Author: | glhays [ Thu Sep 10, 2020 3:04 pm ] |
Post subject: | Re: What type of crystal is this stone? |
At first glance I thought it looked like a carved pig's snout, but glue makes more sense. |
Author: | SueWillBow [ Fri Sep 11, 2020 3:07 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Have checked the crystal under an ultra violet light and it glows red across all of it. If it was glue it would show a different colour surely. After doing some research this could be fluorite. The small stones around the centre stone show black in ultra violet light. |
Author: | Barbra Voltaire, FGG [ Fri Sep 11, 2020 10:17 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Could you take a picture of the back side of the piece and post it. Thank you. The fluorescence is weird. Red, eh? What other instruments do you have to help ID? |
Author: | SueWillBow [ Sat Sep 12, 2020 4:54 am ] | ||||
Post subject: | Re: What type of crystal is this stone? | ||||
Here’s some pics of the brooch, a couple of the back and one of the stone under uv light. It is a bit dark but you can see how the crystal is showing red. Hope this helps.
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Author: | abeck [ Sat Sep 12, 2020 11:57 am ] |
Post subject: | Re: What type of crystal is this stone? |
Look closely at the photos - in the center there are 5 light blue faceted objects joined by a colorless resinous substance. In the UV photo, the faceted items are glowing reddish, the colorless stuff is just reflecting the red a bit. None of the center stuff is of the same style or age as the rest of the piece. Probably something in the center fell out, and there was a clumsy attempt to fill it in. What low-priced natural or imitation/synthetic gem fluoresces red? I am at work and need to get setting gems so I don't have time to look it up. 5 of those are attached to the piece with an excess of adhesive. OK - so I looked. Don't tell my Boss! Most likely flame fusion spinel... ? Back to setting diamonds! |
Author: | Barbra Voltaire, FGG [ Sat Sep 12, 2020 1:01 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Excellent help!!! Thanks. The piece is stamped 800, most probably indicating silver 80%, alloy 20%. The piece is very tarnished or perhaps it was plated in the beginning of its life. Aside from that abeck is correct. There are 5 stones in the center which have been glued together and the glue (under UV) is reflecting their fluorescence. I suspect the accent stones are foil backed glass but that is speculation. Check them with magnification, SueWillBow. |
Author: | abeck [ Sat Sep 12, 2020 1:15 pm ] |
Post subject: | Re: What type of crystal is this stone? |
Barbra Voltaire, FGG wrote: Excellent help!!! Thanks. I suspect the accent stones are foil backed glass but that is speculation. Check them with magnification, SueWillBow. I was wondering about that too. They could be either foil backs that have lost their foil (don't see proper reflection for the mirroring), or either non-foil back glass or the original "rhinestone", faceted quartz. |
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