Natural polished rough pieces of boulder opal from Queensland, Koroit field.
These pieces have been polished to a specimen/low commercial grade.
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/polished 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