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Our Mission

Thank you for visiting the Opal Gallery website.
Opal Gallery (previously known as Bentine Gems, the world’s largest Opal trading company) has been operating in the Gold Coast, Queensland, Australia since 1985. In 1999, we became independent and became known as Opal Gallery in 2003. We have been an Opal specialist for over 35 years.
With the evolving world of online shopping and digital communication, we believe that it is important that we provide genuine and authentic products rather than enhanced or artificial Opals which are often mistakingly purchased. We are Opal professionals with an extensive knowledge on Opals which we hope to share with you.

We have provided Opals to many VIPs through exhibitions at Australia embassy in Tokyo and other Major Cities in Japan. Also awarded Akiko Wada, a famous singer in Japan, the title of ‘Opal Queen’ together with the Australian Government.

Due to COVID-19, we have started our new online store to enable customers to learn about Opals and purchase products from anywhere in the world. We hope to provide the same high quality customer service and experience as the millions of customers who have previously visited our store through the online platform.
Please immerse yourself in the magic of Opals and enjoy making Australia’s national gemstone as a special treasure, just for you.

Opal Gallery Managing Director
Hidemasa Kojima

Our History

1985 – Bentine’s Gold Coast branch opened in Cavill Avenue, Surfers Paradise QLD.
1999 – Bentine became independent and was known as BT Gems.
2000 – A branch in Osaka, Japan open.
2003 – Bentine Gold Coast changed its name to Opal Gallery.
2008 – Osaka branch closed.
2009 – Mini Musuem opened on the first floor of Opal Gallery.
2020 – Opal Gallery launched an online store.


Hidemasa Kojima
Managing Director
1986: Arrived in Australia for a working holiday
1986: Employed by Bentine Gems at the Gold Coast branch
1993: Became the Gold Coast branch’s manager
1999: BT Gems was established; became the managing director
2003: Changed the name of the business to Opal Gallery


Company Profile

Opal Gallery is gold member of JAA (Jewellery Association of Australia). 

Managing Director

45 Cavill Ave Surfers Paradise QLD 4217 AUSTRALIA

0034-800-400949(Toll-free call from Japan)

Opening hours

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