The green colored opal from that locality falls apart more readily (crazes) than the other colors ... I've heard this is due to a slight radioactive content, but haven't tested it myself. But since most of it crazes anyway, not a good lapidary material. The pea soup green color is especially bad ... which is why there are usually shards of that all over the pit floor.
Bob

 out of  found this valuable. Do you find this valuable?    

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