The customer is a partnership between Petra itself and the South African subsidiary of Stargems Group, a world and vertically built-in diamond firm, which can lower and polish the stones.
“We’re delighted that each stones can be manufactured in South Africa, and it’s becoming that we are going to be working with Stargems, who specializes within the sourcing and provide of the best diamonds to clients the world over,” chief govt Richard Duffy said in the statement.
Petra fetched in March $12.2 million for a 299.3-carat Type IIA white diamond. That meant it obtained $40,701 per carat, which exceeds the $34,386/ct obtained for the 424.89-carat “Legacy of the Cullinan Diamond Mine” in Could 2019.
Sort II diamonds are discovered much less regularly and are extra helpful than Sort I diamonds, as they don’t have any measurable nitrogen impurities. This provides them distinctive transparency and brilliance.
Sort IIb blue diamonds are so uncommon that their age has not been established. Current research on minerals trapped inside these diamonds indicate that they’re among the many deepest-formed diamonds ever discovered, created at depths in extra of 500km under the Earth’s floor.
Cullinan is named the birthplace of the famed 3,106-carat Cullinan diamond, which was lower to kind the 530-carat Nice Star of Africa.
It’s additionally the world’s most vital supply of blue diamonds, such because the 39.34-carat stone Petra present in April and which sold for $40.2 million last month. It was the corporate’s highest value ever for a single stone.