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Garry Holloway

Garry Holloway left a career in geology and founded Holloway Diamonds in 1976 (formerly Precious Metals)  His passion for diamonds and the way they are cut began. In 1984, he studied the Fire Scope(TM) as part of his thesis in the Gemmological Association of Australia’s Diamond Diploma. This led to a long and passionate interest in the cut of diamonds.

After the publication of the GIA’s ‘brilliance’ report in 1998, this passion became a crusade to improve the cut quality of all diamonds.

This passion resulted in the development of the Holloway Cut Adviser (HCA) online cut grading system in 2000 which was granted a US patent in 2007. Four years later, GIA developed its cut grading system on the same basis.

HCA has now been used by the public and trade to grade the cut quality of billions of dollars of diamonds.

In 2001, Garry invented and began selling the portable Ideal-Scope to view diamond light leakage on round diamonds. In 2005 he further developed the scope and made the handheld ASET scope for the American Gem Society which is a tool used for grading the cut quality of fancy shaped (nonround) diamonds.

Garry also worked as part of the R&D ‘Cut Group’ which includes industry leaders and innovators Mr. Sergey Sivovolenko, Dr. Yuri Shelementiev, and Mr. Janak Mistry. Garry was the Australian and NZ agents for Sarine Technologies until he began representing new and competing technologies of OctoNus and DiamCalc used by leading diamond cutters around the world.  Garry continues this work today as a consultant and this facilitates the ‘outshine’ factor of Holloway Diamonds and also better prices.

Garry Holloway
FGAA, DipDT, JAA Appraiser

Garry Holloway
Garry Holloway – Holloway Diamonds