Subtle Flaw - Big Problem in this Australian Opal!
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These 10 GEMS can make You Rich
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@AZFortificationAgates Cuts a Killer Big AZ Agate Hunk
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$6000 investment - The best cut ever - Rare Harlequin Black Opal
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Sacrificando uma ágata pela ciência (faz diferença onde você a corta?)
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The Best Australian Opal You've Never Even Heard Of - PIPE OPAL
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Two Different Opals = Two Fabulous Stones
15:25
#16 Opal Cutting - Nobby Opal
20:47