Trade Services

Our specialised services to the trade have always been the engine that drives our business, and we are keen to work with fellow jewellers and the public to sustain high standards within the UK jewellery industry. At Holts, we offer a wide range of services, as listed below, and are happy to advise you in every respect.

We understand gemstones

Calibrated Gemstones

At Holts we stock a large range of calibrated precious and semi-precious gemstones, including Diamonds, Emeralds, Rubies and Sapphires and also the more unusual gemstones aswell. The availability and price can be confirmed by contacting our sales floor on 020 7405 5286.

Gemstone Testing

Our qualified Gemmologists will provide you with a certificate stating the type and variety of gem material and will also list all the physical characteristics of the piece such as weight and measurements. If you would like to use our gem testing or valuation services please visit our showroom in Hatton Garden. Charges for gem testing start at £40VAT per piece. Please contact us regarding prices on jewellery identification reports and prices on larger lots of loose gemstones.

We Buy

We will always view loose and mounted gemstone jewellery at our showroom. No appointment necessary.

Other services

Lapidary - Cutting and Polishing

At Holts we have an in-house Lapidary department which caters for all designs from a simple cabochons to complex carvings.

Bead stringing

Holts is renowned for its unique stringing, restringing and multi-strand stringing service. Our extensive range of pearls, and precious and semi precious beads can be threaded into fabulous creations by our in-house bead stringing team. For your convenience orders are normally completed within 2 weeks, and for a small fee, jobs can be posted to you upon completion.

Technology Services

Working alongside bespoke designers and goldsmiths, CAD designers help turn hand-drawn jewellery designs into a three dimensional reality, however complicated or intricate. At Holts you can sit down with the CAD designer and discuss your ideas. Once the design has been agreed on, the CAD expert will then interpret your idea into a three dimensional object on a computer screen. The model is viewable from any angle on and any distance from the computer screen, and with the help of 'rendered' snap-shots of the virtual model, you can also see how your idea will look in precious metal and with gemstones before its even been made. You can then make any revisions to the piece before it gets cast; such is the fantastically flexible nature of CAD.


Holts are regular suppliers of choice to the media industry be it sale or loan of certain materials or use of premises. However, there are specific types of gems which cannot be loaned out due to their fragility. Please contact for further information.
Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact Holts Gems Trade Contact
Thank you, your message has been sent.