You are buying a 100gms of this larger deal quality opal parcel from Lightning Ridge area of Australia.
The material is mainly fossil mater
Some of the opalis super bright with dark to black base base so the colours are brighter.
Wetted to bring out colours
Rule in Millimeters
Measurements are generally rounded down and approximate
Colour : Please note the camera has been white-balanced to give truer colours NO Photo Shopped enhancement.