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A natural rough shaped piece of boulder opal from Queensland, Winton area.
Would make a very nice gem.
The parent stone is nice and hard so a great polish all over should be achievable.

Blocked out to reduce postage weight
Rule in Millimeters
The material has been wetted to help show the colours
Measurements are generally rounded down and approximate

Colour : Please note the camera has been white-balanced to give truer colours NO Photo Shopped enhancement