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bill greenaway said:Lefty is quite right - many Australian stones are of good quality and do not need treatment before cutting. It is also true that the better quality greens can look very like glass - although any cutter should know the difference. I attach a picky https://www.prospectingaustralia.com/forum/img/member-images/1873/1412653429_dscf7408.jpgof a clear green stone (3.5 carat) dug on Bedford Hill, Rubyvale a few days ago, and yes - it could be taken for a piece of glass!
Yep, you can see how a tourist would straightaway think it was only a bit of glass - would have thought a jeweller would have recognised the stuff, especially since he should have known that a very major sapphire producing field was within the region.
I've never actually been to Bedford Hill - you're down pretty deep there (about 50 feet) aren't you?
It always gets me how every area on the field seems different. At our old claims at Russian gully 35 years ago, the wash was a thin layer about 8 inches thick under about 8 feet of overburden. At the new place, it's almost at the surface but the stone is distributed a bit of a funny way. Dad reckons the stone was more evenly spread throughout it at Russian gully - as evenly spread as you can find stone anyhow - but at this place it's concentrated into little tiny pockets less than a metre in diameter, scattered about the place. There is the odd stone floating about on it's own but basically, unless you happen across a pocket you get nothing. The pockets were obviously stream bed depressions or something like that of some kind and I keep looking and looking to see signs of what it is that concentrated cutting-size stones plus a heap of little chips into a tiny spot together but whatever it was is probably long eroded away. There aren't even any depressions in the floor where I've found the pockets that I've been lucky enough to hit.