Please click the link below to take you to the "Find a Valuer" page on the "Institute of Registered Valuers" website and select "East Anglia" to find me. All IRV's have a registered number, mine is IRV96916

About Us

Represented on prestigious website: "Jewellery Appraisers of the World".

In addition to having valuation experience over the past ten years, and working in the trade for over twenty years, Gaynor has held the following positions: 

Additional training from Hearts on Fire Diamonds, Christian Bauer wedding rings, Brown and Newirth wedding and diamond jewellery, Domino Jewellery ltd., Raymond Weil, Rotary, Longines, Bering, Pandora, Georg Jensen, Gemex diamonds and gemstone jewellery, Clogau, and Europearls. 

Qualifications and Experience

  • M.I.R.V.(Memberof the Institute of Registered Valuers). There are currently around 160 IRV members in the UK. To achieve this status, one must have proven experience and gained specified qualifications in gemmology and diamond grading and have passed the National Association Jewellers CAT (Certificate of Appraisal Theory) programme and exam. A Valuer is then required to submit sample valuation work for assessment which must meet the Institute's high standard. All IRV's are monitored on a regular basis). Additionally, one must have a minimum of five year's experience in the trade. Number 96916.
  • D.G.A(Diamond Grading Associate Gem-A). Distinction in practical and theory, specific study on diamond girdles and their effect on the stones performance.
  • N.A.G. Professional Jeweller (Gemmology) Diploma-Distinction
  • IGI (International Gemological Institute -Antwerp) Diamond Grading Course
  • BA (hons) Degree Jewellery Design and Manufacture
  • ​CPAA Pearl Specialist
  • Fellow of the National Association of Jewellers
  • Member of the Society of Jewellery Historians
  • Member of Hertfordshire Gem Club
  • Member of UK Gemological Association 

GHM ​Jewellery Valuations

Gaynor Haylett-Mustafa © 2013

Jewellery Valuations in Saint Neots Pe19 Cambridgeshire


  • Dower & Hall Ltd.                         1996-1998  Boutique Manager, Beauchamp Place, London. Leading British designer/makers producing contemporary silver and gold gem-set designs.
  • Tiffany & Co. Ltd.                         1998-2006  Boutique Manager, Harrods, London Promoted from Assistant Manager 2002. International Jewellery House, established in New York in 1837
  • Baker Brothers Ltd.                2006-2014    General Manager Bedford and Letchworth        An Independent jewellery and watch retailer, specialising in loose diamonds, and luxury brands such as Rolex, Marco Bicego and Georg Jensen
  • Piggotts the Jewellers Ltd.  2015-2016  Store Manager, St. Ives, Cambridgeshire           An independent jewellery and watch retailer specialising in Bridal and fine jewellery.
  • Working independently as GHM Valuations and also for First Valuation Services, a jewellery valuation company established for over 36 years.