The spring 2016 auction season achieved nearly US$800 million in sales between March and July, with fancy coloured diamonds and coloured gemstones top-billing the season’s offerings. A report by Russell Shor of the Gemological Institute of America (GIA) showed that Christie’s and Sotheby’s, which control over 90 percent of top-end gem and jewellery sales worldwide, beat Read More →

GIA researchers say that a recently graded synthetic stone – the largest of its kind to be studied by the organisation – exemplifies how quickly synthetic diamond technology is progressing and the increasing importance of identification. The stone, which was examined at the Gemological Institute of America’s (GIA’s) New York laboratory, was supplied by Russian Read More →