Recognised Opal Valuer
Australian Opal - Australis Gems
Australia Gems - Mining opal, rough opals and cut opals
Australia Gems - Mining opal, rough opals and cut opals
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Australis Gems is owned and operated by Nick Kollias, South Australia's recognised and registered opal valuation expert.

Nick is a tertiary qualified Applied Chemist, Gemologist and Registered Appraiser, giving piece of mind to his clients knowing that they are in good hands.

Nick has had 20 years hands on experience in the opal industry, and has been involved in all all aspects of opal production and distribution. Recognised as the National Council of Jewellery Valuers specialist opal valuation expert, of which he is President of the Sth. Australian Division.

"It's an amazing industry, which I'm proud to be part of."
Being in the most privileged position Nick has seen and valued some of the finest opals ever unearthed, from the finest rough opal to the most incredible opalized dinosaur bones.

"Not a day goes past without seeing an opal which is unique or extraordinary."
"Don't hesitate to contact me direct with any opal enquiries"

Rough Opal

Nick Kollias

  • Applied Chemist IACH
  • Gemmologist FGAA
  • Registered Valuer NCJV SA 97-69
  • President NCJV SA Division
  • Approved Federal Government Opal Specialist valuer cultural Gifts Program


Australis Gems
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