Boulder Opal Parcels
Boulder Opal Parcels
Individual Boulder Opal Stones and Splits
Winton Boulder Matrix
Queensland 3-Kilo Lots
Three great parcels
A special collection from an old friend
A Christmas Special
About Boulder Opal
Boulder opal occurs in two main forms, 'seam' and 'matrix'.
When opal intrudes into cracks and seams in the host rock (usually
ironstone),
it is called SEAM boulder opal.
Seam boulder opal is often 'split' along the seam so as to produce
one or two faces of opal material.
When the opal is mixed more completely within the host rock,
it is called MATRIX boulder opal.
Matrix boulder opal is most often cut so as to show the patterns
of opal within the host rock.
And, as you might imagine, there are cases where the distinction is
not clear...
However, whenever the 'stone' is not solid opal, and includes at least
some of the host rock (usually ironstone), then it is called BOULDER opal.
Go to the Order page and let us know what you want as soon as possible !
We look forward to dealing with you.
MURRAY W. WILLIS
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Copyright 2007, Australian Opal Mines. All rights reserved.
Last modified: August 14, 2007
Murray Willis