Boulder Opal from Central Queensland.
Seams of opal running across and through the faces of ironstone material.
These pieces would be great to practice cutting boulder opal on.
Hopefully with some nice stones as a result
The pieces are wet to bring out their colours.
The Ruler is in millimetres.
Measurements are rounded down and approximated.
Colour: Please note the camera has been white-balanced to give more accurate colours NO Photo Shopped enhancement.