World Gemological Institute

Gemological Certification

14 Greville Street London EC1N 8SB

Mon-Fri 9.30am to 6.00pm

For over the past 30 years the World Gemological Institute (WGI) have build a solid standing reputation as one of the leaders in the Industry.

Richard Taylor jewellery valuation

specialist jewellery valuation service

The London Diamond Bourse 100 Hatton Garden London EC1N 8NX

Monday to Friday 10am -5pm

Professor Richard Taylor the principal valuer and consultant have more than 30 years’ experience in preparing expert reports.

Holts Gems

coloured precious gemstones

Holts Gems, 1st Floor, 39 Greville Street, London, EC1N 8PJ.

Mon to Thurs 10am-5pm Fri: 10am-4.30pm

Gemstone expertise since 1948, Holts Gems specialise in bespoke and gemstone-set jewellery and lapidary insurance valuations.