Gem: Matrix Opal
Weight: 16.69 cts.
Size: 57.61 x 12.68 mm.
Color: Tan, Black and White with Red, Blue and Green Flash
Cut: Marquise Polished Slab
Locality: Andamooka, Australia
Treatment: Impregnated (Sugar)
Here is a fantastic and intriguing Opal. This is matrix Opal and it is an old and not well known material. It is a more porous opal found in the mining fields of Andamooka. Matrix comprises precious opaline silica as an infilling of pore spaces in silty claystone. It generally shows fine pin fire colors in its natural state. The matrix opal is cut and polished, soaked in a sugar solution and then boiled in sulphuric acid depositing carbon in the available pore spaces which enhances its color. This type of matrix opal was exclusively found at Andamooka, but is no longer being mined. This stone displays stunning pin fire flash of red and purple/blue with some minor greens. It also has several patches of crystal Opal (White) mixed into the Matrix. This piece would make a one of a kind pendant that would be absolutely stunning!
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