Opal Treatments

Below is the entire list of Johno's blog posts relating to Opal Treatments.

Experimenting with Doublets and Triplets

22 September 2020 by Johno

Experimenting with Opal Doublets and TripletsWith plenty of time on my hand during the Corona Virus lock-down I decided to experiment with the making of opal doublets and triplets.Traditionally doublets are made with a potch backing and triplets with a potch backing and a clear glass, plastic or quartz top....

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Experimenting with opal

22 June 2020 by Johno

Trying something different with your opal Most opal lends itself to cutting some form of cabechon. Some will have rounded tops and others, where the opal has a band of colour, will have flattened tops to ensure we get the most out of our opal. When we have thin layers of opal...

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Turning opals into Jewellery

19 February 2020 by Johno

Turning your Opal Collection into JewelleryIt is wonderful to have a collection of opals that you have cut and polished. But what is the point if you only look at them occasionally and the rest of the time they sit in a drawer with no one to admire them. Opal...

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Some Beautiful Andamooka Matrix Opal

2 December 2019 by Johno

Andamooka Matrix Opal Andamooka Matrix opal is a unique form of opal found only at the Andamooka Opal field in South Australia. It consists of a fine grained limestone rock with opal ingrained in this limestone matrix. The opal can exist in all sorts of patterns. Because of the...

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Some More Andamooka Matrix Opal

24 May 2017 by Johno

Andamooka Matrix Opal Recently Ross from NSW contacted me and asked if I could treat some Andamooka Matrix Opal his father had found some time ago, when he mined at Andamooka. Ross apparently has quite a collection of Andamooka Matrix opal and is looking to sell it. If anyone...

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More Andamooka Matrix Opal

5 November 2015 by Johno

Andamooka Matrix Opal Andamooka matrix opal is still a much maligned form of opal in many people's minds. The fact that it is a treated form of opal seems to ignore the fact that it is still basically one of natures treasures with it's beauty enhanced by changing the...

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Andamooka Rainbow Matrix Opal

5 May 2015 by Johno

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...

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More Andamooka Matrix Opal

6 October 2014 by Johno

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...

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Cutting Opal - Doublets

13 February 2013 by Johno

If you have any thin pieces of opal with nice colour but believe it is too thin to cut a cabechon then think about making a doublet. A doublet is basically a fairly thin layer of usually opal glued to a thicker layer of opal potch or some other...

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Andamooka Matrix Opal

17 January 2013 by Johno

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...

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Treating Andamooka Matrix Opal

15 November 2010 by Johno

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...

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