All of our stones are certified by one (or more) of the world’s leading gemmological laboratories. This is essential to demonstrate the origin and the key characteristics of a gemstone.
These detailed reports accompany each stone at all times and they are easily verifiable. The main four laboratories that certify the stones we supply are described on this page. They are fully independent and completely impartial. Follow the links below each icon to explore their websites and find out more about them.
The GIA are the world’s foremost authority on the certification of diamonds and other gemstones. The GIA is a non-profit making institute dedicated to research and education in the field of gemmology and the jewellery arts. Founded in 1931, the GIA’s mission is to protect all buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
The institute does so through research, gem identification and diamond grading services and a variety of educational programs. Through its world-renowned library and subject experts, GIA acts as a resource of gem and jewellery information for the trade, the public and worldwide media outlets.
Based in Lucerne, Switzerland, Gübelin have forged a reputation as the preeminent body for the certification of Emeralds and other gemstones.
Founded in 1850, they are one of the oldest and most highly respected certification institutions in the world. Indeed their founder, Dr Eduard Gübelin, is said to be the “father of modern gemmology.”
CDTEC´S professional team is specialised in very diverse and specific technological processes, which are fundamental in the assessment, tradition and authenticity of Colombian gems.
Based in Bogotá, Colombia, and with their finger on the pulse of the fine emerald trade, CDTEC have developed a reputation at the forefront of gem certification.
SSEF is a Swiss gemmological institute founded in 1974 and part of the Swiss Foundation for Gemstone Research, specialising in coloured gemstones.
Its forte lies in the detection of gemstone authenticity, origin and gem treatments. It offers expert independent advice to a wide gemmological clientele including gem dealers, collectors and auction houses.
“Fantastic. Having an engagement ring made is a scary thing, you hope it turns out like you imagined but mine turned out even better! Phil was helpful and patient throughout a long process of me asking questions, making changes, etc. He delivered it in person to check I was happy and, overall, I found a much more personal service than you would expect from a primarily online business / more personal than any walk-in shop! Thanks again Phil.”
“When my partner and I first discussed the prospect of tying the knot, I decided that I wanted to be part of the decision process for my engagement ring. London DE expertly guided me through hundreds of possible options to find my perfect match! I’m certainly not an expert but the colour and sparkle of my engagement ring took my breath away and it was a fraction of the price of similar pieces I saw in jewellery shop windows!”
- Annabel Sayers
“On enquiring for a ring Phil from London DE was able to quickly identify the style that would be perfect and a full range of options. He provided expert advice and I bought the perfect ring (to help in getting the right answer!). Having seen a number of other rings recently I know that the ring I received was both of the highest quality for the right price and I wouldn’t hesitate to recommend Phil and London DE for anyone looking to ask a certain question.”
- Liam Connors