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Divers of Sewa 150
Artisanal Diamond Divers in the Spotlight
Fifty-year old John is a diamond diver in Sierra Leone, one of a few hundred or thousand such divers out of some 1.5 million artisanal miners worldwide. His work is arduous: Going 5 to 10 meters underwater without a mask, he relies on his...
Mining Oct 07, 2020 Sonia Esther Soltani
La Peregrina pearl
SSEF Launches Service Identifying Pearl Species
The Swiss Gemmological Institute (SSEF) has introduced a service that determines a pearl’s species using DNA fingerprinting.The Basel-based laboratory has substantially expanded its database and capabilities, enabling it to identify each of the eight oyster...
Technology Jun 03, 2020 Rapaport News
SSEF Gem Track
Lab Debuts Rough-to-Polished Gem Tracker
The Swiss Gemmological Institute (SSEF) has launched aservice for linking polished gemstones to their original rough, it saidTuesday. GemTrack creates a fingerprint that documents the stone’sjourney from mine to market, based on analyses of the stone’s...
Polished Markets Feb 26, 2019 Rapaport News
LMHC padparadscha
Gem Group Clarifies Sapphire Color Requirement
Stones must have a stable color to qualify as padparadschasapphires, according to a ruling by the Laboratory Manual HarmonisationCommittee (LMHC), a global alliance of gemological groups.Gemstones that turn pink during a color-stability test donot meet the requirements for the...
Polished Markets Dec 11, 2018 Rapaport News
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