The Gemological Institute of America (GIA) has reopened laboratories in five locations following COVID-19 shutdowns.
The organization’s labs in Johannesburg and Tokyo recommenced limited operations on May 7, the GIA said Monday. Visitors to the Johannesburg lab must make an appointment, have a permit, and wear a mask. The Tokyo location will accept and return goods by delivery only.
On May 11, the GIA resumed operations at its locations in Antwerp and in Gaborone, Botswana. While Antwerp is receiving customers by appointment only, Gaborone is open with a limited capacity to comply with government mandates and allow for proper social distancing, the GIA noted. The lab in Carlsbad, California, reopened May 18, with submission of goods only accepted by shipment.
Labs in Bangkok, Hong Kong and Ramat Gan, Israel, are all open, and are operating with regular hours. Operations in Mumbai, Surat and New York remain closed.
“Our first priority is to protect the health and safety of all staff, clients and visitors,” said Tom Moses, the GIA’s executive vice president and chief research and laboratory officer. “As we work to meet our clients’ needs whenever and wherever possible, we are planning for the safe opening of all other GIA locations as soon as conditions and government authorities permit.”
Source: Diamonds.net
The Gemological Institute of America (GIA) has identified a stone comprising two halves of a diamond that had been stuck together with an “unknown adhesive.”
Graders noticed a large fracture and cavity on the table of the marquise-cut, 1.38-carat polished diamond submitted to the GIA’s laboratory in Carlsbad, California, for colored-diamond testing. When the gemologists examined the crack under a microscope, they noticed a gap running down the stone from the crown to the pavilion, as well as a slight misalignment in the facets and air bubbles inside the fracture.
The polish lines on the stone’s facets would have linked if there hadn’t been a fracture, GIA gemologist Troy Ardon explained this month in a lab note in the latest edition of Gems & Gemology. For that reason, gemologists determined that the stone had been broken in half after it was at least partially polished, and then repaired with an unidentified adhesive.
“Diamonds have been adhered together with glue to form a diamond-doublet, but a broken diamond that has been repaired was not something previously reported by GIA,” Ardon added.
The GIA couldn’t grade the diamond because the 4Cs wouldn’t apply to it, the note continued. A carat weight would have been meaningless, as it would have comprised the weight of both halves plus the adhesive.
Image: Robison McMurtry/GIA
Source: diamonds.net
