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|Author:||75TURBO [ Tue Sep 19, 2017 5:29 am ]|
|Post subject:||Fluorite threelobes|
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".
A little help:
Any comment will welcome.
|Author:||Stephen Challener [ Tue Sep 19, 2017 3:26 pm ]|
|Post subject:||Re: Fluorite threelobes|
'Mercedes logo' zoning is sometimes seen at larger scales in fluorite, particularly Illinois ones. Here's one from Spirifer minerals:
I've never seen them at this scale though--that's really interesting!
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