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Queensland Boulder opal 20cts rub / rough / preform Koroit Blue fires 25x15x4mm BR#05
Queensland Boulder opal 20cts rub / rough / preform Koroit Blue fires 25x15x4mm BR#05
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This is a nice Boulder opal of the Queensland opal fields.
From Koroit mining area , this is a opal in ironstone matrix
blue fires showing on exposed face
Preformed so only needs a little work & a Polish lots potential here
Please note boulder opal is ironstone host rock with deposits of opal.
- Details: #BR#05
- Weight: 20cts
- Grade: POTENTIAL GRADE
- Base Colour: Boulder tone
- Source: Queensland Australia
- Field: Koroit
- Size: 25x15x4mm
- Type: Koroit Boulder rough
- Colours: blue colours to veins
- State : In the Rough rubbed and preformed
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Solid, Natural, Untreated Opal, Ironstone Host rock
![Queensland Boulder opal 20cts rub / rough / preform Koroit Blue fires 25x15x4mm BR#05](http://boulderfevermate.com/cdn/shop/files/385705181_122118623444033963_1889766882559991585_n.jpg?v=1696107752&width=1445)
![Queensland Boulder opal 20cts rub / rough / preform Koroit Blue fires 25x15x4mm BR#05](http://boulderfevermate.com/cdn/shop/files/385695786_122118625970033963_3639830863111097245_n.jpg?v=1696107752&width=1445)
![Queensland Boulder opal 20cts rub / rough / preform Koroit Blue fires 25x15x4mm BR#05](http://boulderfevermate.com/cdn/shop/files/384529123_122118625604033963_4209772310902321026_n.jpg?v=1696107752&width=1445)