Natural rough shaped pieces of boulder opal from Queensland, Winton area.
Some of these should make very nice gems.
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