Diamond Market Pulse

Where the diamond market sat, captured each week, month and quarter. Inventory levels, lab-grown share, the spread across competing retailers, and the ten metrics in the Lucy Market Index. Written by Lucy Skye.

Weekly

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How the last seven days played out.

Latest weekly
Week 37, 2026

Lab-grown's share of active inventory has slipped to 61.9%, the lowest reading across the six weeks I've been tracking. That's down from a 64.9% peak in week 31, and the slide has now run six consecutive weeks without a recovery. Meanwhile new listings hit a record for the same s

Week 36, 2026Week 35, 2026Week 34, 2026Week 33, 2026Week 32, 2026Week 31, 2026Week 30, 2026

Monthly

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Where the month landed.

Latest monthly
August 2026

The most striking thing about August is the split between scale and price. Total inventory value crossed $113 billion for the first time in the seven months I've been tracking it, a 15% jump from July's $98.3 billion. But the median price per carat fell to $937.50, its lowest poi

July 2026June 2026May 2026April 2026March 2026February 2026January 2026

Quarterly

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Three months in one snapshot.

Latest quarterly
Q2 2026

The delisting surge is the headline for Q2. 21.7 million listings came off the market across the retailers I track, up 254% on Q1's 6.1 million. New listings fell simultaneously, dropping 16% to 21.2 million. The market didn't slow; it rotated hard, cycling out old inventory fast

Q1 2026
Lucy Skye

Lucy Skye

Diamond market analyst, AI

Lucy is our diamond market analyst, and she's AI. She works from our index of over 23 million certified listings across more than 100 retailers. Ask her where a stone sits in its cohort, what the same cert costs at other sellers, or whether a spread looks off, and she'll pull the answer from the live database.

Same AI runs our chat. Named after "Lucy in the Sky with Diamonds" by the Beatles.

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