This shows me mining boulder opal 40 ft underground in my mine in Koroit. Koroit is an opal mining field (not a town) in the outback of southwest Queensland, Australia. It is about 85km NW of Cunnamulla. Even though the bolder I dig out in this video just looks like a brown rock, it contains plenty of beautiful opal. Thanks for watching, Gene McDevitt, to see more, visit my website: www.koroit.com, and visit my other youtube account: http://www.youtube.com/bestopal
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