Does natural Alexandrite have to glow bright red under ultra violet light ???
I have bought an antique alexandrite and diamond cluster ring, the alexandrite being around 1 carat. it looks very real as it has a deep forest green colour with a blue tone to it. it has a schiller across it when looking at curtain angles and does appear to have a dark red/purple colour to some degree under incandescent light. i have now been told it cant possably be alexandrite as it MUST glow bright cherry red under u.v light and it must be some other stone like a strange colour sapphire or tourmaline. i have searched high and low for any referance to this u.v light issue and can find no reference to this at all.
does any one have the answer please ??? is this glowing bright red under u.v light thing true or do some glow and some dont ???
No, just the opposite. Alexandrite is a bluish-green is sunlight(or ultraviolet) light and a shade of red under incandescent light. The shade varies a little depending on the amount of chromium impurity in the mineral.
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