Gem Digital Analyzer a Winner

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GDAPowerHouseThe GDA opens at the Powerhouse Museum

The 2010 Engineers Australia Awards exhibition is now open at the Powerhouse Museum celebrating innovation, creativity and technological achievement, the exhibition was officially opened by the President of Engineers Australia Peter Hitchiner and the Head Curator of the Powerhouse Museum. The Gemmological Digital Analyser™ (GDA), Sydney Winner of Innovations and Inventions, was on display and expected to be viewed by half a million people during the year.

The exhibit incorporates an interactive display, including a working turntable alongside five premium opals. The five majestic gems are the Cerulean Rose, Astral Flame, Coral Lotus, Pacific Blaze and the Arctic Fire.

Alongside the exhibit, the Powerhouse Museum has produced an 8-page special report in the Sydney Morning Herald, detailing the GDA™ as well as other innovative technologies on display. Anyone interested in the GDA™ is urged to visit the Powerhouse Museum to view firsthand the technology and its exciting potential. To find out more about the GDA, please visit © 2009 Opal Producers Australia Limited




Opals set to shine with new grading technology

The GDA technology shines opals in new light - CSIRO Media Release - 31 August 2009

Opal Producers of Australia Limited (O.P.A.L.), have just unveiled their new GDA technology, which will help revolutionise the way we look at opals. The GDA, Gemmological Digital Analyser, is the world’s first device to objectively analyse and grade the opal gemstone based on a number of factors including colour, clarity, carat, character and cut.
The groundbreaking news was presented to over 70 delegates and members of the National Council of Jewellery Valuers and the inaugural NCJV forum in Darling Harbour on the 30th August 2009 by Dr Leanne Bischof, Mathematical Sciences, CSIRO and Kayt Primmer, Director O.P.A.L..

This was only 5 years after the establishment of O.P.A.L, conceived by a group of miners and industry consultants passionate about the potential of the Australian opal industry. The GDA was their plan to ensure a grade quality assurance that would improve confidence in opal trading, thus significantly expanding the Australian Opal Industry.

O.P.A.L contracted CSIRO to carry out image capture analysis and software engineering and now O.P.A.L has incorporated this knowledge into the GDA for improved opal characterisation”. O.P.A.L also contracted Applied Robotics Pty Ltd, a leader in the field of robotics engineering, to design and construct the hardware for the GDA.

The GDA’s complex scientific opal analysis procedure involves having a camera inside a controlled environment to take 871 images of the stone as it rotates on a stage which moves 360 degrees horizontally and tilts 90 degrees vertically. The technology involves robotics, optical light analysis and innovative software programming to analyse the opal’s gemmological characteristics, providing a classification grade.

Dr Leanne Bischof, who helped pioneer this innovative technological advancement, argues that because opals have such a unique range of colour characteristics, this makes them by far the most difficult gemstone to appraise, “A person’s judgment of an opal’s colours, the brightness of those colours and the area each of them covers is a really difficult task, even for a skilled opal assessor. You really need objective image analysis and automation to assist with that”.

In order to ensure that GDA analyses were accurate, an extensive industry survey was carried out, involving the participation of independent and experienced opal industry personnel with a cumulative industry experience of over 1,000 years. There is no system in the world that works as objectively, thoroughly and in such detail as the GDA.

With the present trading scenario, opals are not internationally competitive when compared to other gemstones. The GDA technology is integral to improve the profile, demand and value of opals in international gemstone markets.

Australia produces 95% of the world's supply of opal and the estimated value of our opal industry is around $50 million a year. In the past, the introduction of an independent grading system has immensely benefited other Australian commodities like wheat, coal and gold. With the advent of this new technology, it is hoped that the opal industry will follow in these footsteps and thrive.

“We wanted to create an objective grading system that would improve the demand for opals and value of the Australian Opal industry. We can improve outcomes for all stakeholders in the industry and lift the consumer confidence in an independently-graded Australian opal, which we will brand as Opallia,” Peter Sutton, director of O.P.A.L, said. The GDA system will be a significant improvement over the inconsistent results of subjective evaluations.

By increasing the value and profile of opal internationally, this will breathe new life into outback towns and communities, and reposition Australia's National Gemstone on the world stage. The GDA technology will mean all participants in the opal industry will all get a chance to enjoy the financial and investment rewards for the Australian economy.

Images of GDA available at:


Sue-White opals29 June 2013
Dear Rainbow Serpent,
Thank you for your email and membership.
It is great to know that you are out there promoting Australia's National gemstone & NSW emblem.
Keep up the good work, I love your concept.
Sue White - Orana Glitz & Glamour Extravaganza Inc Assn.

15 march 2013
Hi Peter,
Colourful characters are key,
your Facebook page and the photos look like there are some fantastic people!
We loved the look of Tarzan of Opalton.
Gemma Brady - Boundless

Alexander fink.PhysicsPHD opal28 Nov 2012
I would like to welcome your information page on opal,
with detailed information about nearly everything their is to know in a general term.
Alexander Fink PhD - Dept. of Physics La Trobe University

5 August 2010
Hi from another opal lover.
Just wanted to say I love your site, a wealth of information.
I always send people to your page for opal info.
Kind Regards
Sean Tapner - Planet Opal

8 july 2010
Dear Rainbow Serpent,
Will be recommending your website as a primary reference to 15 Macquarie Uni media students who will be doing a PR project for us as part of their assessment soon.
Best wishes
Renata - Opalminded

Opalminded recommend opalsinformation6 June 2010
Dear Rainbow Serpent, 
Greetings from Opal Minded In Sydney.
We are all very impressed with your website – one of the best things that has happened to this Industry for a long time. 
We would love to share it with the visitors to our website. 
Would you mind If we post with us links to your website, 
also on our facebook and twitter. 
Best wishes
Renata, John, Nelly, Fabrice and Summer

Fri, Apr 16, 2010 
Good Morning,
I have just found your wonderful website.
I produce a monthly e-newsletter which is circulated to the Tourism businesses in Coober Pedy and neighbouring stations plus the Info Centres around SA & the NT.
I wondered if I could use some of your Opal info in my October Edition (Opal Month), mainly the parts in your “About Opal” section – names, spiritual info etc.
I would obviously reference it to your website noting the address so others could read your site. 
Sandra Harris
Tourism Officer - Coober Pedy Information Centre

5 April 2010
I am wanting to use your site in an assignment as it is a superb example
of a site to use for a primary teaching unit on gemstones.
Many thanks,