GMCASA what is it?

The acronym GMCASA stands for the ‘Gem & Mineral Club Association of South Australia’, an organisation consisting of all the Gem & Mineral Clubs and Detecting Clubs in South Australia.

In 1972 six clubs – AGMC, NDGC, WREI (now DRCI), SR and YPGMC, and from the border in Victoria, Sunraysia,  got  together and staged the GEMBOREE 1972 at Tanunda South Australia.

At the close of that GEMBOREE these six clubs decided to form a State Association – namely GMCASA, which has expanded as more Gem & Mineral Clubs and now Detecting Clubs have been formed in South Australia. GMCASA now has a membership of 19 clubs.

The purpose of the Association is to foster the Lapidary and Allied Arts and Crafts and Sciences, to get all Clubs under a common ‘Code of Ethics’ to protect flora, fauna, native arts and natural monuments. Another function is to watch and monitor legislation as it relates to clubs and to maintain good public relationships with State and local authorities, landowners and the general public.

Another important factor is the standardisation of competition rules and judging throughout Australia. This means that no matter where or at what level of competition one is at, the rules will be exactly the same and judging will be standard.

GMCASA is a Foundation Member of AFLACA (the Australian Federation of Lapidary and Allied Crafts Association) and through that organization maintains full contact and liaison with all interstate and national affiliated and/or associated organizations. GMCASA, through a sub-committee, co­-ordinates the Clubs efforts in staging the National Gem & Mineral Show – GEMBOREE, so we hope that you will enjoy 2018 an onwards.


Home Page Picture:

The Quartz crystal cluster from Ashton Quarry located in the Adelaide Hills is 134mm x 80mm x 60mm and also has a tabular Faden Quartz crystal which makes this specimen unique. It was collected by Don Williamson on a field trip in 1977 in a small unused quarry at Ashton.

On this particular day, Don found three Quartz seams which joined at the bottom of a small slope, and where they joined he found a small hole which he gave a tap with his rock pick that opened up into a vugh.

Don found more Quartz crystal clusters and crystals that day than he had in nine years of going to Ashton quarry, all clusters and crystals were coated with iron oxide.

Once Don returned home he soaked the clusters and crystals in Hydrochloric Acid to remove the coating.  To his amazement, he had collected some of the best Quartz crystals ever found at the Ashton Quarry.