Contact Cool Diamonds

Address: 16 Greville Street, London, EC1N 8SQ United Kingdom

Appointments to view

Viewings may be available for diamonds over 0.5Ct. and jewellery over £1500.

Viewing times are Tuesday to Saturday 11:30 to 17:30 by appointment only please email us at for an appointment requests.

Sales: Our lines are open Tuesday trough Saturday 11:30 to 17:30 on +44 (0) 20 3691 8213 for a fast response on Sunday and Monday please emails us on (please note that for security reasons callers with the phone number ‘withheld‘ or ‘no caller id‘ may be going to our phone spam filters)


Hatton Garden opening times by appointment only:

Tuesday to Saturday 11:30 to 17:30 Closed Sunday and Monday.

To request an up to date valuation:

To make a payment to Cool Diamonds: