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What gem is this - thoughts please.

Bron357

Ideal_Rock
Premium
Joined
Jan 22, 2014
Messages
4,111
Hi everyone, this ring I've had for over 20 years, bought it at a secondhand shop, it's a lovely, hand made 14kt gold setting with a huge lime greenish colour stone. At the time I thought it was just glass or treated crystal of some type. It's a rather unusual colour and I bought because I loved it. People often ask "what is that???" And I've said (over the years) green Quartz, peridot, tourmaline ??? However, since purchasing a Presidum gem tester I have found that it tests in the Topaz range. So any thoughts as to what this weird lime green lump might be? img_3001_2.jpg
 

Bron357

Ideal_Rock
Premium
Joined
Jan 22, 2014
Messages
4,111
Another possibility is green spinel (same range on the gem tester) and I found this image of an Art Deco ring with green spinel and ruby and mine stone is a dead ringer in my opinion. img_3003_0.jpg
 

pokerface

Shiny_Rock
Joined
Sep 12, 2011
Messages
208
I have seen this sort of material before but the name of it is slipping my mind. 99% sure it is glass. The second ring posted most likely is synthetic spinel.
 

DDOC

Rough_Rock
Trade
Joined
Jul 24, 2016
Messages
91
Synthetic Spinel Bron.
I have a 30 ct emerald cut one in the safe somewhere. London Blue Topaz colour.
They cost about 10 cents a carat, plus cut fee.
 

index_finger

Rough_Rock
Joined
Oct 24, 2016
Messages
15
synthetic spinel?
Does it color change? Another possibility is synthetic alexandrite?
 
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