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Please help me identify if these are fake or treated
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TomS




Joined: 08 Feb 2017
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PostPosted: Feb 09, 2017 19:14    Post subject: Re: Please help me identify if these are fake or treated  

Mike Wood wrote:

Maybe a close-up photo of a single crystal from 2 and 3, with light from behind it as well, would give us a better idea.


I'll try to get some more pics of those. Thanks for your thoughts so far.
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Bob Harman




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PostPosted: Feb 09, 2017 22:10    Post subject: Re: Please help me identify if these are fake or treated  

There are lots of green selenite (var. gypsum) specimens from Australia. They come in various shades of pale thru bright green. While many are entirely natural, some may be color enhanced. Each individual specimen needs to be evaluated on its own merits. The evaluation should be in person rather than thru a photo and should include seeing if the green color can be removed or lightened with water or a solvent such as alcohol or acetone etc. The color should be compared to a known natural example. BOB

As an addendum, they are from the PERNATTY LAGOON locality in South Australia. Go to the selenite page on the Mindat website to see virtually identical specimens including several offered by an ethical and prominent hi end dealer. Also many may be viewed by simply googling "green selenite". Lots of examples pictured there.
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