Quote:
Originally Posted by renormalised
Did you try and crack it open. Sometimes potch contains good opal. Lots of people find lumps of potch and just throw it away thinking it's no good. Some people have had small fortunes in their hands without realising it!!!.
My experience with gems and such not only comes with being a geologist, but I've also been prospecting for gems and such since I was knee high to a grasshopper  Found my first sapphire when I was about 2   Could grade them according to colour and quality when I was 5  
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No I did not. But you are right, I should have. In those days potch and milky opal was worthless - now you can get some money for it because Chinese are making all sorts of ornaments from it. But when we went to try our luck
to Duck Creek in Queensland that was another story. The field got (boulder
?) opal and we used to broke every nodule we found.