This Andamooka opal from south Australia is being treated, very old production, not available much these days.
|Hardness||Country of origin||Size and shape||Price|
|5 1/2 – 6 1/2||South Australia||various||Please call for prices|
Opal is hardened silica gel, usually it contains 5 to 10 percent water, it can happen that in the course of time, the stone loses water, cracks, and the play of color diminishes, temporarily, that’s why opal is treated sometime to make it hard, and durable.
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