Photo #44
African Green Opal (does not show opalescence), not to be confused with Australian Opal.
This type of stone is soft, difficult to work with (shatters), and can vary in quality significantly in quality.
(low quality pictured, higher quality in Photo #45)
I know a lot of Rock Tumbling enthusiasts steer clear of this material due to the difficulty and often poor results.
I do enjoy the challenge.
Preferred angle of the larger piece in natural light pictured below.
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