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Blue gem-red fluorecence question

ioannis

Rough_Rock
Trade
Joined
Oct 31, 2015
Messages
24
Dear sir or maddame..
As i told in many other issues i own pawnshop and usually intresting items come in to shop..today one intresting item arrived but unfortunately i dont know what is it..it has a normal light blue color as you can see in the photo but under uv light it emits red fluorecence its weight is 2.03 carats and dimensions is 0,88x0,55 cm what gem it could be and does red fluorecence means synthetic creation?

_20160308_0.jpg
 

tourma-guy

Shiny_Rock
Joined
Mar 30, 2015
Messages
134
Synthetic blue spinel will fluoresce red under UV. That's a possibility. Sapphire can also have fluorescence, but its usually on the weak side from what I understand.
 

lilmosun

Ideal_Rock
Premium
Joined
Jun 30, 2014
Messages
2,272
I wouldn't try to identify the stone but fwiw my unheated purple-blue sapphire definitely fluoresces under a UV light...it's not as light as the stone pictured.
 

chrono

Super_Ideal_Rock
Premium
Joined
Apr 22, 2004
Messages
38,187
It could be synthetic but fluorescence alone isn't a definitive test. The result is usually considered together with the RI number to narrow down the possibilities. Any way to test the SG?
 
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