New York Edition
New York · Worldwide
The Stone Market
FRONT PAGE →Prices, auctions, supply — the numbers behind the stones.
The Stone Market · AnalysisOne Hundred Carats: What the Number Actually Means
The most searched question about hundred-carat diamonds hides a distinction the market rarely explains: a hundred carats in…
The Stone Index: Two-Thirds of the Top of the Market Weighs Five Carats or More
First edition of The Stone Index: 67.5% of catalogued stones weigh five carats or more, and above ten…
The Stone Market · ProvenanceThe Fifth C: Provenance
Cut, colour, clarity, carat — the four Cs describe a stone the day it is graded. There is…
The Stone Market · RarityThe Purest Thing on Earth
A vanishingly small share of the diamonds ever pulled from the earth belong to a chemical class so…
The Stone Market · Auction WatchGeneva’s Autumn Season: What to Watch
The November salerooms will set the year's public numbers. Here is how to read them like the trade…
The Stone Market · The TradeWhy “Investment Grade” Means Something Specific
A term abused everywhere in this trade, defined precisely once — so you can hear when it is…
The Stone Market · AnalysisThe Pink Paradox: Rarer Every Year, Wanted More
The great source of pink diamonds closed in 2020. Supply ended; desire did not. The arithmetic of impossible…
The Stone MarketThe Quiet Rush Into Five-Carat Stones
While the world watched auction records, America's serious buyers moved down a quieter corridor — the five-to-ten-carat stone,…
The LEGACY List
One letter a week — the stones, the stories, the numbers that matter. Discretion is the house rule.