An Australian boulder matrix opal is a precious opal mixed with the parent rock rather than in seams
or patches.
The parent rock is an ferruginous rock ( containing iron ), and is called ironstone.
It is found exclusively in Queensland.
By world standards, It is a "Natural opal,Type 3".
or patches.
The parent rock is an ferruginous rock ( containing iron ), and is called ironstone.
It is found exclusively in Queensland.
By world standards, It is a "Natural opal,Type 3".
What is an Australian boulder opal matrix ?
Australian boulder opal matrix definition
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