Queensland Boulder Matrix opal 50cts rough / slice Koroit  some blue fires 27x19x8mm 15ARP

Queensland Boulder Matrix opal 50cts rough / slice Koroit some blue fires 27x19x8mm 15ARP

$15.00
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This is a Boulder opal of the Queensland opal fields. From Koroit mining area , this is a opal in ironstone matrix This has been sliced to exposed the potential and faces to work with  veins of opal showing some of colour  Please note boulder opal is ironstone host rock with deposits of opal. Details: #15APR Weight: 50cts Grade: POTENTIAL GRADE Base Colour:  Boulder tone Source: Queensland Australia Field:  Koroit Size: 27x19x8mm Type:   Koroit Boulder rough Slice Colours: some colours to veins State : In the Rough sliced Solid, Natural, Untreated Opal, Ironstone Host rock

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