What is Andamooka Matrix Opal?
This is what they call the mother of opal. It is said to be mined prematurely, before the opal has had enough time to fully develop. Over the years we have learnt how to treat it in a sugar and acid solution. This does not add any colour to the stone, it only darkens the background from white to black.
As Andamooka Matrix is a porous stone it is also slightly textured. The end result once polished isn't always perfectly smooth and can have some natural stone markings.
The finished product is incredible, it looks like a black opal!
What's the difference with Rainbow Matrix?
Andamooka Rainbow Matrix won't take a polish but lends itself to a lovely finish with a sealant (ie Liquid Glass) to bring out all the beautiful colours.