Reports and services for every precious item.
WGI gemological reports describe the characteristics of each article submitted to the laboratory. With a unique online verification number, they may cover loose or mounted diamonds and gemstones and the precious metals present.
Diamond Grading Report
A detailed analysis of the 4Cs — carat weight, colour, clarity and cut — with a proportions diagram.
Lab-Grown Diamond Report
Identification and grading of laboratory-grown diamonds, loose or set in jewellery.
Jewellery Grading Report
A full-colour report describing the jewellery piece, its metal and its stones.
Gemstone Identification Report
Standard identification and verification of coloured stones and diamonds.
Pearl Grading Report
A thorough assessment of a pearl's type, lustre, surface, nacre and matching.
Watch Report
An expert evaluation of a watch's authenticity, condition and value.
Laser Inscription
A microscopic, permanent inscription on the girdle or table of a diamond.
360° Video & Imaging
HD 360° video of diamonds, gemstones and jewellery, linkable from the report's QR code.
Verbal Pre-Grade / Evaluation
An expert verbal assessment before you buy, so you understand what you are investing in.
Professional Photography
Jewellery and gemstone photography by trained specialists using advanced equipment.
Arrange a WGI report.
Contact our London laboratory in Hatton Garden or one of our offices to submit an item or ask about a service.