Specialist knowledge
and expertise

Our appraisers are highly trained and experienced professionals with a wealth of knowledge in the field of jewellery and gemstones.

You’re in good hands with us. We’ve been valuing jewellery since 1973, with founder Graham Oliver passing on his business and knowledge to established Valuer and Gemmologist, Nicholas Tsalis


Nicholas Tsalis, qualified gemmologist, diamond grader, registered member of the Jewellery Valuers Society NZ..

Nicholas Tsalis

Nicholas is a qualified Gemmologist, Diamond Grader, and a registered member of the Jewellery Valuers Society of New Zealand. During his extensive 17-year career, Nicholas has worked for a number of jewellery manufacturers, diamond merchants, and retailers. Having worked and apprenticed under Graham Oliver for the past six years, Nicholas has developed a deep understanding and expertise in what we do, along with a robust passion for accurate and independent valuation.

Sally O’Hagan, Valuers assistant and pearl re-threading specialist.

Sally O’Hagan

Sally is our Valuers assistant and Pearl re-threading specialist. With a career spanning more than 30 years that began under the guidance of Graham Oliver, Sally’s experience and knowledge within the trade have allowed her to establish herself as an industry leader and a valuable member of our team.

Graham Oliver, qualified gemmologist, diamond grader, qualified Jewellery Manufacturer, registered member of the Jewellery Valuers Society NZ.

Graham Oliver

Graham is a qualified Gemmologist, Diamond Grader, qualified Jewellery Manufacturer, and registered member of the Jewellery Valuers Society of New Zealand. With a career that spans over 50 years, Graham’s knowledge of the jewellery and gemstone industry provides our business with proven expertise and knowledge that is invaluable to our team. Today, Graham enjoys a semi-retired lifestyle that sees him pay a visit to our office on an appointment-only basis.


Have a question? Contact us today by filling out this form. A member of our team will be happy to help answer any of your questions.


    Monday to Friday
    8.30am to 4:30pm


    Level 2
    111 Customhouse Quay
    Wellington, 6011


    04 499 5756



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