Family owned and operated for over 40 years.

The Australian Opal and Diamond Collection is proudly a family owned and operated business in Adelaide, Australia. Since 1980, Joe and Sylvia Dimasi have been committed to showcasing the beauty of Australian Opals to the world.

The Australian Opal and Diamond Collection (AODC) is one of Australia’s leading Opal merchants. We are Wholesalers, Exporters and manufacturing Jewellers of Australian Opal Gemstones. We have an extensive range of Australian Opal Jewellery, including the rare and prized Black Opal. Our mission is to provide the finest products that Australia has to offer and showcase them to the world. We have three show rooms in Melbourne, Hobart and Adelaide as a head office.

Natural, Australian Opal Jewellery

The Australian Opal and Diamond Collection are committed to offering our customers 100% natural Australian opals. We never use colour treated or synthetic opals. Our opal jewellery is handcrafted in Adelaide by our experienced jewellers. Each piece is carefully designed and created to celebrate the unique beauty of each opal piece.

Australian Opal in Service to Royalty

The Australian Opal and Diamond Collection has manufactured and designed pieces for several Monarchs around the globe, including HRH Queen Mary of Denmark and HM Queen Sylvia of Sweden. Sylvia Dimasi, Chief Designer at The Australian Opal & Diamond Collection was also approached to design a unique piece for Princes Mary (now she became Queen Mary) to celebrate the birth of her son, Prince Christian. This spectacular piece consisted of a Solid Crystal Opal from Mintabie, South Australia, surrounded in diamonds. This particular piece of jewellery converts into three different pieces, a pendant, ring and a brooch.

Participating at the World expo

We have been chosen on two consecutive occasions to represent Australia at the World Expo, in Aichi, Japan, 2005 and Shanghai, China ,2010. We have moved to two countries for six months to promote Australian Opal, South Sea Pearls and Diamond at the Australian Pavilion.

 Exhibiting at the international Congresses and private exhibitions for more than thirty years

We have been invited to exhibit at many international conferences in Australia and overseas. We have been invited to the International Rotary Conventions since 2003,

And International Lions conventions since 2008.