Do you know that the largest current reserves of top quality nephrite in the world are to be found in Australia? At Cowell in South Australia. Reserves of around 80,000 tonnes were estimated by the SA Department of Mines & Energy, now the SA Department for Energy & Mining (DEM) some years ago and have probably increased since!
But currently, there is no market for Cowell nephrite in Australia and most people don’t even know jade is found here, though it is well appreciated overseas, especially the high quality Black Jade, which is startlingly beautiful.
Yet there is a local market for other Australian minerals like opal and coloured Argyle diamonds, and my dream is to have jade pieces selling in every jewellers and tourist shop in the next decade where you can currently find either of the foregoing gems. Why not?
I was told (Jeff Olliver, pers comm) that DEM used to provide a display of Cowell jade along with expert staff to answer questions at the Adelaide Festival of Arts. This ceased in recent times, no doubt when the previous owner of the exploration lease had problems and production stopped.
To resurrect a local industry in SA I suggest the following:
An upsurge in interest in Cowell jade at home would likely encourage exploration investment, tourism, an awakening to the beauty of Australia’s mineral wealth, new jobs and skills in SA and an increase in the tax take by the state. So let’s make it happen together!
But now back to my story. My stock of Cowell (bought in NZ many years ago) was running low, to the point where I didn’t have a suitable piece for a carving I wanted to produce for an exhibition in Sydney. So having previously met in Melbourne with a manager of the company which currently owns the mining lease (Cowell Jade Mining, a division of Gemstones Australia), the need for my wife to travel to South Australia for work was a great opportunity to visit, by arrangement, the company’s operations in Cowell.
The company’s stock yard is a dream as you can see above! But most of the material is boulders weighing up to several tonnes, way too big for me to carry home, let alone cut and work. Also, with few cut and polished faces on the pieces of rough material it is really hard to tell exactly what I was buying, because I couldn’t tell:
I was kindly directed to an area of the yard where much of the material had been cut and graded. Oh heaven!!! After deciding to purchase about 50 kg of the rocks there, I was kindly invited to visit a couple of the quarries with the manager. They were everything I hoped for! The geology of the area is tricky, but fascinating and the new company is working hard at understanding the factors and looking for high quality stone.
There are more than 100 outcrops of nephrite in the Cowell Jade Province. The host rocks are dolomitic marble and banded calc-silicates of the Palaeo- & Mesoproterozoic Minbie Gneiss, which is around 1.8 billion years old. The jade formed about 1.7 billion years ago, developing during cooling and folding/faulting of the host rocks (information gleaned from the DEM website).
I could bang on about the chemistry and other technical aspects of the province, but if you are interested I’m sure you will check them out for yourself.
Only some of the lenses are being exploited because current demand is not that large, and the company has to remove a lot of very hard host rock to expose the elongated pods/lenses of jade, which might be high quality, or not.
What can I say? I learned a lot and I am excited about getting to work on the jade in the near future. And a big thank you to Gemstones Australia for their kindness and help.
I’m going to include further blogs on the Cowell Jade Province in future so watch this space!
18/11/2021 06:10:42 am
Hey my Dad leased the Cowell mine from 69 to the early 80s, Its so true not much on the Cowell jade
Hi Sue, thanks for your comment! It's wonderful to have you aboard! Sadly there is still little market for Cowell here in Australia and, understandably, much of the stone is exported. Any ideas you have for improving awareness of this world-class resource would be very useful. If you would you like to add some reminiscences here it would be fabulous!! Nigel
21/8/2022 09:13:04 am
howdy Nigel I am back again,slowly it is taking off the little more information on the price per kilo.So like my Mum says it will never go off or moldy.BrumsJade
13/2/2022 04:26:40 pm
15/4/2022 08:37:20 am
Hi Nigel. Interesting comments and very sad to hear that Cowell jade still hasn't taken off. I was one of the geologists mapping the jade province. Have many fond and interesting memories of the time and the people we worked with and the visitors we showed around. I have a few raw pieces, mainly from Outcrop 15, a black jade site, Which I'm now trying to sell here in the UK. Trying to find current value for pieces of raw jade. Any thoughts?
21/8/2022 09:17:11 am
so I got told by stewart from sydney crystal show,it is about 50 cent per gram for raw and a dollar per polished gram.Thats black dark green cowell nephrite.So probably 500 per kilo 2022
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On this page I intend to add monthly updates on aspects of jade carving. I also plan to invite more experienced carvers to offer a "master-class" on a particular subject of their choice. With this I hope to enthuse both the novice and the expert in this ancient and beautiful art-form/craft. And comments are welcome!