Lab also rolling out new comments clarifying impact of fluorescence.
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Output to grow 4.4% year on year to $5.6 trillion, according to federation.
Business closed after jewelry mogul was accused of $1.8 billion bank fraud in 2018.
Lead item is a Van Cleef & Arpels diamond ring, but six of the top 10 contain the blue gemstone.
Stone from Jwaneng mine will feature in Sotheby’s Hong Kong luxury sale on April 23.
Move leaves the miner with some 50 contract customers.
10.02-carat Tiffany & Co. diamond ring is top seller, fetching $520,700.
Brand will remain as collection within Blue Nile.
Ring centering 26-carat stone brings in $1.3 million at recent London auction.
Shipments up 9% year on year in February.
Market Comment: March 19, 2026