The Gemological Institute of America (GIA), the world’s leading authority on research into gemmology, has cut 20 per cent of the workforce at its California headquarters.
The De Beers Group has published the results from its fifth sales cycle of the year, identifying a further decline amid weakened global demand for diamonds.
A pearl and diamond necklace with matching earrings once owned by Princess Diana, known as the Swan Lake Suite, is expected to return up to $US15 million ($AU22.1 million) at auction.
The World Federation of Diamond Bourses (WFDB) has partnered with the Natural Diamond Council (NDC) to provide financial support for upcoming marketing campaigns.
The Gemological Institute of America (GIA) has received some negative industry feedback over the recent decision to issue digital grading reports instead of paper certification.