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I believe it's a black opal but need help…

This topic contains 4 replies, has 3 voices, and was last updated by Profile photo of mr-nopain4u mr-nopain4u 9 months, 4 weeks ago.

Viewing 5 posts - 1 through 5 (of 5 total)
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  • #200813
    Profile photo of kelliebach
    kelliebach
    Participant

    My uncle gave me a bunch of random uncut gems, rocks, and minerals a few months back. This dark green one was a little rough looking, I believe he grinded the matrix off years ago… And never knew what it was. Anyway, I just finished cutting/polishing it. It’s 36cts finished.
    (One moving video sorry about the pup) and one photo of the early cutting stage)

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    #200815
    Profile photo of kelliebach
    kelliebach
    Participant

    Sorry!! The other video was too large of file. Here’s a 6 second video of the polished gem on the polish stick still

    #200817
    Profile photo of kelliebach
    kelliebach
    Participant

    Sorry!! The other video was too large of file. Here’s a 6 second video of the polished gem on the polish stick still

    #200876
    Profile photo of sydp
    sydp
    Participant

    Hi Kellie, looking at the still photo, it appears that it may have a crystalline structure with some form of re entrant marks on the stone.
    it is always difficult to analyse a gem from a photo, but if this is the case then it cannot be opal.

    I have had a look at the video but cannot determine what the gem is,
    hope this helps in some way

    thanks.

    #201175
    Profile photo of mr-nopain4u
    mr-nopain4u
    Participant

    Hi Kellie.
    I collect gems and preferably in the black opal from Australia but also opals from other countries. And that the others have written, it is difficult to determine from the photo / video and I have a hard time getting it to Opal, but without polish/cut to mutch, can you try to do one or two facets ..vinkla o lighting with light / sun and the black / white background … nice if you could take pictures then, you see a little redwill increase the chance otherwise think probably is it tourmaline ,, crystal structure! ??
    anyway .. It´s very nice at the photo/video 😉
    best of luck Sten (Yup, thats my name:) )

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