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Directory - Gemmological Association of Australia (GAA)

380-382 Spencer St
West Melbourne
VIC Australia 3003

P: 1300 436 338

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Of all the great debates in the gem and jewellery industry, the ‘hottest’ topic continues to be natural versus synthetic diamonds. Varying, and sometimes, ‘opposing’ information is continually published as both synthetic and natural diamond technologies continue to develop.
While Australia remains the world's premier supplier of opal – accounting for approximately 90 per cent of the opal on the market – significant opal deposits were discovered in Ethiopia in 1994, 2008 and 2013.
Australia – the home of opal – is well known the world over for black and white opal specimens; however, boulder and matrix opals are a huge part of the Australian opal industry and only increasing in popularity.
Opal is famous for the incredible array of colours displayed, from vibrant reds – the most prized – to velvety purples and everything in between.
Diaspore derives its name from the Greek word diaspora – meaning ‘to scatter’. The prized colour-change varieties may be better known as Csarite or, formerly, Zultanite.
The Gemmological Association of Australia (GAA) is Australia’s long established gemmological educator. Since 1945, the Association has been responsible for producing Australia’s gemmologists by educating and updating members of the gem and jewellery industry and the general public, about all aspects of gemstones and their substitutes.

Why GAA?
We are passionate and enthusiastic as evidenced in our dedicated team of professional educators and volunteers. Being a not-for-profit organisation provides assurance that we operate with the best interests of our members and students in mind

Our lecturers and demonstrators maintain a high academic standard whilst ensuring that what students study is also relevant. Restricted class sizes ensure that everyone receives adequate attention. With the GAA having Divisions in every state in Australia it means that our graduates become part of a local gemmological community – of benefit for networking and ongoing training.

On the job training, with its many benefits, is simply not enough these days. Can you confidently identify a diamond imitation like synthetic moissanite? A beryllium treated sapphire? Or laser drilled diamond? Not being able to answer such questions as these can cost a business thousands, not to mention reputation. Confidence and Knowledge sells.

For course information and GAA membership, contact us at:
1300 436 338 or

Members of the GAA receive quarterly The Australian Gemmologist — the informative and prestigious journal of the Association, also Division newsletters, free talks by guest speakers, library facilities and special rates for courses.
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