Australian Boulder Matrix Opal and Sterling Silver Pendants
Boulder opal is precious opal that has formed within ironstone concretions, so-called "boulders", which can be from a few centimeters to more than one meter in diameter.
Boulder opal occurs only in central-west and south-west Queensland, Australia. The opal fields are in a 300 km wide and 1000 km long area of deeply weathered Cretaceous sedimentary rocks known as the Winton Formation. Although the boulders are widely distributed in that area, only a small proportion of them contain precious opal.
The term "precious opal" refers to opal that exhibits play of colour.
"Play of colour" means the rainbow-like colours caused by the diffraction of light.
Opal comes in many different quality and grades. Below is an example of a lot of 50 pieces of mixed boulder matrix opal pendants: interesting patterns, beautiful pieces, reasonably priced. Your customers can take a piece of Australia home at a very affordable price.
"Opal The Phenomenal Gemstone", published 2007 by Lithographie, LLC, 112 pages.
This book is available from Silk Road Gems.