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On offer is a piece of treated seam opal from Andamooka, South Australia.
This material has been sugar treated and heated to darken the host material of this matrix opal.

The piece is wet to bring out its 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.