About us

We will always welcome you with friendly, attentive service, and we are committed to providing you with the best valuation service for all your jewellery, diamonds, gemstones and watches. 

Tim Bicknell DGA, FIRV Tim Bicknell DGA FIRV

Tim Bicknell DGA FJVA

Tim became a registered Valuer in 2002, and Managing Director of Jewellery Portfolio in 2008. A Fellow of the Jewellery Valuer's Association (FJVA Registered Valuer No.20108), a Member of Gem-a, and a Founder Member of the Academy of Valuers, Tim was elected to the committee of the IRV in 2016 and also served on the IRV Standards Sub-committee, Tim is on the committee of the Jewellery Valuers Association, and a founder member of the JVA. Tim is regularly invited to deliver workshops on valuation methodology and diamond assessment to new and future valuers in London for the GIA and Gem-a, and America at the Tucson gem show, and at the annual Loughborough Conference for Valuers and Jewellers.


Winner of the 2017 David Wilkins Award

At the 2017 Loughborough Conference for Valuers and Jewellers Tim Bicknell was announced the winner of the IRV David Wilkins Valuer of the Year award. This award, voted for by the members of the Institute, is the epitome of a valuers career.


The trophy, an Elizabethan style silver dish which is engraved with the names of past winners, was presented to Tim by Mrs Margaret Wilkins, the widow of the late David Wilkins (he was instrumental in the introduction of the N.A.G. Registered Valuers Scheme back in the 1980s, the forerunner of today’s Institute).


Michelle Knust MIRV Michelle Knust MIRV

Michelle Knust FJVA ​

PjVal Dip, PjGem Dip, FNAJ, Cert GA


Michelle has been in the jewellery trade for 37 years, and a registered Valuer since 2015.

She is a Fellow and Founder Benefactor of the Jewellery Valuer's Association (FJVA Registered Valuer No.20177). Michelle has passed the CAT exam in appraisal theory, and holds a Cert GA and Professional Jewellers Gemmology Diploma, as well as completing the diamond grading course with the GIA.  She is a Fellow of the National Assosciation of Jewellers, and is also a member of the Society of Jewellery Historians.

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