The International Gemological Institute (IGI) has introduced Light Performance Grading Reports showcasing round brilliant-cut diamonds with exceptional optical qualities. The IGI Light Performance grading...
Grading reports produced by IGI will now offer a "light performance score" for round brilliant cut diamonds.
They'll provide an overall score - low, moderate,...
The event programme at Oroarezzo, from 11th to 14th May, will include an in-depth analysis of processing techniques for the jewellery and fashion accessory...