Natural Madagascar Yellow Opal Crystal.

Discussion in 'Jewellery & Gems' started by silversearcher, Jan 20, 2018.

  1. silversearcher

    silversearcher Active Member Silver Stacker

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    I've found Madagascar Yellow Opal a challenging stone to facet. It's soft so it's very brittle. Chipping a girdle can be done with ease. It's also sensitive to heat. On removal from the dop it can chip or break also. But I will continue to learn to cut such stones as they not often faceted. Being not entirely clear, more a semi translucent stone makes it also challenging find clean clear pieces without veils, cloudiness or inclusions. But I won't let all these difficulties get the better of me. I'm determined to someday cut a nice yellow opal. Hopefully it will come from this 147 carat piece shown in this photo. Anything over 4 carats I would consider to be a large cut, considering Opal is a lighter gem in density.

    OPAL2.jpg
     
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  2. BenKenobi

    BenKenobi Active Member

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    I have a vein of very similar material hidden away in the bush I found while prospecting for gold, it does chip very easily I have faceted a bit just for the hell of it and tumbled some others. The vein I have found runs for about 35 metres on the surface, colour ranges from lemon yellow and is very clean through Apple green which is also clean, it then runs into a very rich chrome green with dendrites or what may be iron and clouds of possibly feldspar, pretty stuff though but very soft and brittle as you mentioned.
     
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  3. BenKenobi

    BenKenobi Active Member

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    Just in case you think I am full of shit here's a few bits from the deposit as described:) DSC_Z4.jpg DSC_0401.jpg DSC_0391.jpg DSC_0390.jpg DSC_0386.jpg DSC_0389.jpg .
     
  4. silversearcher

    silversearcher Active Member Silver Stacker

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    The green makes for a interesting colour. I'm thinking of cutting a square also. Well done on cutting this.
     

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