Blacklock Jewellery

Service Providers

We work with leading service providers to ensure that your experience of Blacklock Jewellery is second to none.

Also in this section:

Some of the key service providers for Verification, Payment, Security, Delivery and Insurance


All of the diamonds that we supply or use (over 0.50cts) are independently certificated, which means that their characteristics (i.e. cut, colour and clarity) are independently verified. One of the leading laboratories is the Gemmological Institute of America.

Established in 1931, the Gemological Institute of America is the world’s foremost authority on diamonds, coloured stones, and pearls.

GIA exists to protect all purchasers of gemstones, by providing education, laboratory services, research and instruments needed to accurately and objectively determine gemstone quality. A nonprofit institute, GIA's mission is to ensure the public trust in gems and jewellery by upholding the highest standards of integrity.

Lots of our diamonds are independently verified by the GIA.


We use Sage Pay to process all payments. Sage Pay are specialists in payment processing and operate to the highest standards from a processing, security and fraud prevention view point. Sage Pay is level 1 PCI DSS compliant and are active members of the PCI SSC (Security Standards Council).


We have partnered with FedEx to ensure safe and secure delivery of your jewellery or loose diamonds. After your item has been packaged, it will be delivered via FedEx. All loose diamond purchases and items of jewellery will arrive via FedEx International Priority®, arriving in 1-4 business days after shipping from Blacklock Jewellery. Most areas receive overnight delivery. Please contact us directly for more details on the FedExing of your jewellery or loose stones.

T H March

Established in 1887 T H March are the foremost brokers for the Jewellery Trade. In 1906 T H March were appointed as brokers to The National Association of Goldsmiths of Great Britain & Ireland, and have had a close and amicable relationship with that organisation for what is now over 100 years. TH March is still a family owned business, with Michael Ferraro as the current Managing Director.

Blacklocks' have dealt with TH March for over 30 years. As the leading jewellery insurance brokers in the UK we would recommend any of our clients to use their insurance services at any time. They offer a range of policies according to your needs.

Please quote 'AB107T' when contacting T H March in relation to any insurance matter and you will be recognised as a Blacklock Jewellery client.

TH March are contactable on 01822 855555.


We work closely with Recipero to ensure that all goods received by us are legitimate. Recipero is a leading worldwide database for stolen and counterfeit goods.

We use the CheckMEND product which searches the world's largest database of stolen and counterfeit goods. With over 40 billion serial numbered items of property with information that is potentially relevant to the police. The information is updated in real time every few minutes by law authorities, insurers, industry bodies and the public in over 40 countries. CheckMEND is invaluable in ensuring legitimate dealing.


We use VeriSign to ensure secure encryption and your data. VeriSign is the most trusted SSL mark on the internet and secures more than one million Web servers worldwide, more than any other Certificate Authority. VeriSign also offers the strongest SSL encryption with High-level encryption, at 128 bits. This level of encryption can calculate 2 88 times as many combinations as 40-bit encryption. That’s over a trillion times a trillion times stronger. VeriSign is the leading SSL Certificate Authority and is an essential partner in ensuring safe and secure transactions.

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