Joined: Sat May 21, 2011 7:09 am Posts: 77 Location: Italy
HI,
I own some violet cabs: at first look, they look like amethyst.
After investigation, S.G. and R.I. (spot reading) are in the range of fluorite. Under LW UV the stones are fluorescent and at 130°C they are thermoluminescent.
Under microscope, the color zoning are different from the others fluorite I have seen.
I mean color zones are in the shape of "threelobes".
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