-

Rapaport Press Release: Diamond Prices Soften in Slow September Trading

Record inventory buildup of 0.30 to 0.50 ct. goods

LAS VEGAS--(BUSINESS WIRE)--The diamond market was relatively quiet in September as various Jewish and Indian festivals disrupted activity. Dealers remained optimistic for the US holiday season after positive trading at the Las Vegas shows in late August. China’s economic slowdown brought some caution into the market.

Polished prices softened for goods below 1 carat but firmed for diamonds above 1.50 carats. The RapNet Diamond Index (RAPI) for 1-carat diamonds slid 0.5% during September.

RapNet Diamond Index (RAPI)
September YTD
Jan. 1 to Oct. 1
Y2Y
Oct. 1, 2020, to Oct. 1, 2021
RAPI 0.30 ct.

-1.9%

-1.5%

-6.1%

RAPI 0.50 ct.

-0.9%

-0.1%

-2.4%

RAPI 1 ct.

-0.5%

10.7%

14.9%

RAPI 3 ct.

0.2%

7.0%

14.5%

© Copyright 2021 by Rapaport USA Inc.

Categories below 1 carat weakened as inventory levels increased. A record volume of 0.30- to 0.50-carat diamonds is currently available. Total listings for all sizes on RapNet exceeded 1.7 million unique stones on October 1, up 5% from September 1 and 43% from a year earlier.

Diamond manufacturers have gradually raised capacity following strong rough buying in the first half of the year. High polished output is anticipated in the coming month; suppliers are filling US holiday orders before factories close for the two-week Diwali break beginning November 4.

A lot of goods remain in the pipeline. The Gemological Institute of America (GIA) continues to report a six-week backlog at its Mumbai lab. Rough demand was robust during the De Beers sight that took place from October 4 to 8, and prices were stable. Rough supply is low relative to prevailing demand. Cutters are concerned about profit margins, particularly for rough that yields polished below 1 carat.

Steady US orders are supporting the market. Consumer confidence has dipped slightly as Covid-19 relief money has dried up and due to concerns about inflation and labor shortages. However, jewelers are enjoying a banner year. They have positive expectations for the holiday season, especially since engagement-ring sales typically peak in November to December. There is pent-up demand for weddings after the postponements that resulted from the pandemic, as noted in the October bridal issue of Rapaport Magazine.

Contacts

Rapaport Media Contacts: media@diamonds.net
US: Sherri Hendricks +1-702-893-9400
International: Alex Shine +1-718-878-5138
Mumbai: Prashant Bhojani +91-97694-66855

Rapaport


Release Versions

Contacts

Rapaport Media Contacts: media@diamonds.net
US: Sherri Hendricks +1-702-893-9400
International: Alex Shine +1-718-878-5138
Mumbai: Prashant Bhojani +91-97694-66855

More News From Rapaport

Rapaport Press Release: Diamond Prices See Best Month Since Before Tariffs

NEW YORK--(BUSINESS WIRE)--All four major diamond categories posted flat or positive figures in July, the first such month since March 2025. The Rapaport Trade Diamond Index (RAPI™) for 1-carat diamonds was stable, ending 13 straight months of declines – a sign of stabilization that the July Rapaport Intelligence Report detailed. RAPI rose 1.6% for 0.30-carat diamonds. The index for 0.50-carat diamonds increased 1.8%, its best month since March 2025. Smalls continued to see an upward correction...

Rapaport Auctions Brings America's Pre-Owned Diamonds to Mumbai for India's First Rapaport Viewing Event

MUMBAI, India--(BUSINESS WIRE)--Rapaport Auctions, the auction house division of Rapaport, this week opened its first-ever diamond viewing event on Indian soil. The Rapaport Pre-Auction Diamond Viewing Event runs July 13–16, 2026, at the Bharat Ratnam–GJEPC Mega Common Facilitation Centre (CFC) in Mumbai's SEEPZ Special Economic Zone, staged in partnership with the Gem & Jewellery Export Promotion Council (GJEPC) and made possible through India's Free Trade Warehousing Zone (FTWZ) framework....

Rapaport Press Release: Small-Diamond Recovery Accelerates in June

NEW YORK--(BUSINESS WIRE)--The recovery in prices for small diamonds gained momentum in June, with the 0.30- and 0.50-carat categories seeing sharper increases. The Rapaport Trade Diamond Index (RAPI™) rose 4.2% for 0.30-carat diamonds, up from a 2.1% gain in May. The 0.50-carat RAPI increased 1.3%, also higher than May’s 0.9% rise. The 1-carat index dipped 0.7%. RAPI for 3 carats rose 0.4%, turning positive after a May decline. Inventory reductions continued to support the upward price correct...
Back to Newsroom