Consultancy Buying and Selling

We offer all our clients reliable, professional and discreet advisory services for buying or selling of jewellery or watches.

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Consultancy Buying and Selling

We offer all our clients reliable, professional and discreet advisory services for buying or selling of jewellery or watches.

Buying

That special jewellery purchase…

Whether buying that all important diamond engagement ring to express your love and commitment, or for any other joyous occasion, should be a pleasurable experience rather than one of worry.

Heather Callaway can ensure that you get impartial and valuable advice, so you know you are getting the best jewellery and diamonds at the right price.

We offer a completely transparent opinion of items bought on your behalf through established, trusted and recognised trade suppliers, retailers or at auction.

You can be confident that you shall be paying The Right Price.

Understanding Diamond Value —The Four C's

Understanding Diamond Value —The Four C's

Understanding Diamond Value — The Four C's

When buying a diamond, there are four key factors that determine its value and appearance:

Cut — The proportions and angles that determine how brilliantly a diamond sparkles. A well cut diamond will always outshine a poorly cut one regardless of other grades.

Colour — The natural colour grade of the stone, ranging from colourless to light yellow. The less colour, the more valuable the diamond.

Clarity — The presence and position of inclusions within the stone. These natural characteristics affect both appearance and value.

Carat — The weight of the diamond. Carat has a significant influence on price, but must always be considered alongside the other three factors.

Cut

Colour

Clarity

Carat

The proportions and angles that determine how brilliantly a diamond sparkles

The natural colour grade of the stone from colourless to light yellow

The presence and position of inclusions within the stone

The weight of the diamond — one of the key factors in value

Selling

There shall always be demand for pre-owned quality jewellery and watches.

Whatever the reason for selling your items, we can offer you two discreet options to maximise your return.

Firstly, using our extensive network of trusted auction houses. Heather Callaway has many years experience and numerous contacts in the auction world. We can use these contacts and knowledge to help you negotiate low commission fees.

We also have long standing relationships in the pre-owned market. There are specialist buyers and collectors always looking to buy quality items directly — avoiding commissions levied by the auction houses.

The sole intention of the consultancy is to facilitate the best price possible, acting on a commission only basis.

Whichever route may be the best avenue for you, we are here to offer independent expert advice for your individual requirement.

Ready to Buy or Sell? Let's Talk.

We welcome any questions you may have. Contact us today for more information.

Heather Callaway

Contact Details

  • 07789 275874

  • London, UK

Copyright 2026. Heather Callaway. All Rights Reserved.