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Australian Opal Opal Treatments

Some More Andamooka Matrix Opal

Ross from New South Wales asked me to treat a parcel of Andamooka Matrix Opal his father had mined years ago. Most of the stones treated well and you can view the results on this post.

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Australian Opal Opal Treatments Opal Types

Andamooka Rainbow Matrix Opal

Andamooka Rainbow Matrix Opal is fast becoming popular with those who can’t afford a “Real Opal”. Originally it was called “concrete” because that was what it looked like although you could see small specks of opal in amongst the concrete like grains. It is a porous quartzite host rock in which opal has been deposited […]

Categories
Australian Opal Opal Treatments Opal Types

More Andamooka Matrix Opal

More Andamooka Matrix Opal During the last month I was contacted by Andre who told me he had a couple of pieces of Andamooka matrix opal he had collected some time ago. He purchased one of these from Cash Converters and they were part of a deceased estate. Andre was obviously quite astute as the […]

Categories
Australian Opal Opal Treatments Opal Types

Andamooka Matrix Opal

The term matrix opal refers to a type of opal where there is a base stone with tiny pieces of brilliant opal interspersed within this base stone. The base can be limestone, sandstone or even ironstone. At Andamooka and apparently nowhere else in the world, two types of matrix opal are found. One is called […]

Categories
Australian Opal Opal Treatments

Treating Andamooka Matrix Opal

Andamooka matrix opal is basically a limestone base rock impregnated with tiny pieces of precious opal. Because the limestone is very pale it is often difficult to see the play of opal colour in the stone and hence a method of darkening the limestone background was developed so the colour of the opal could be […]