The GIA has recently come across what it says is the first ever observation of a H4 defect in a CVD synthetic diamond. The stone was submitted to its Carlsbad laboratory for a synthetic coloured diamond grading report recently. The announcement was made in a Lab Note published in the Spring 2017 volume of its […]
The post GIA Reports First Ever Observation of H4 Defect in CVD Synthetic Diamond appeared first on The Jewelry Magazine.
]]>