Diamond Prices – September 2021

The COVID-19 pandemic is no longer the only contributing factor affecting the price of diamonds. As we’ve seen in recent news headlines, socio-economic issues such as riots in diamond mining countries can also have a negative effect on the price of diamonds. As we head into the final months of 2021, we will continue to report on diamond prices and the contributing factors that influence their value. Here is the latest on the average price of round diamonds for September 2021: 


Top 5 Popular Diamond Shapes.

Round diamonds continue to be the most popular shape of diamond on the market. In fact, round has risen in popularity (%) over the past month from consuming 69.25% to 76.44% of the market’s popularity. Princess didn’t even make the Top 5 this month due to the decline in the price of fancies. Oval has increased in popularity (%) going from fourth to second place. Cushion remains in third place. Whereas, Radiant makes the Top 5 for the first time since December 2020. 


Diamond Prices September 2021

The table below gives you the rundown and details of the changes for the last three months (07/01/2021 – 09/01/2021).

Diamond Price Changes from 7/1/2021 to 9/1/2021
Diamond Carat Sizes 7/1/2021 8/1/2021 9/1/2021
0.0 – 0.5 3 % -1 % -1 %
0.5 – 1.0 3 % 3 % -2 %
1.0 – 2.0 3 % 4 % 1 %
2.0 – 3.0 2 % 4 % 1 %
3.0 – 4.0 1 % 4 % 2 %
4.0 – 99 2 % 2 % 1 %

This September the average price per carat for a round diamond of 1 – 1.4 carat G color VS1 clarity is $8,368 compared to August 2021 which was an average price of $8,576. The average price per carat for round diamonds decreased over the past month which is a natural occurrence around this time of the year. 

The current average and lowest prices per carat are shown in PriceScope’s diamond price charts by carat and their corresponding color and clarity. 

Average Diamond Price per Carat.

We advise consumers to keep in mind that cut quality and vendor services such as upgrades and returns can make a significant difference in the price point when shopping for loose diamonds.

PriceScope has been collecting retail diamond prices since 2007 of over 500,000 diamonds. PriceScope diamond price chart page shows the full diamond price charts for rounds and other fancy shapes. We update the diamond prices on a monthly basis. Keep an eye out for October’s diamond prices. 

We should not panic about the slight decrease in the average price of diamonds, as mentioned it’s only natural for the average price of diamonds to take a slight dip at this time of the year. As the economy begins to strengthen we’re feeling hopeful that diamond sales will make a comeback since the downfall of last season. Missed out on Rapaport’s ‘State of the Diamond Industry’ Address? Check out 2021 Rapaport “State Of The Diamond Industry” Review

By Andrey Pilipchak

Latest Publications on Diamond Prices September 2021


Diamond Prices Steady After Vegas Shows

Diamond prices were stable in August, which is traditionally a slower period for the trade. Upbeat activity at the Las Vegas shows reflected the robust US market that has been driving demand. Retail jewelers are having a strong year, spurring optimism across the supply chain.

Rapaport Weekly Market Comment

Dealers return from Las Vegas optimistic for holiday season. Good orders at JCK, Luxury, Antique and Couture shows signal positive sentiment among US independents. Major retailers did not attend but are seeing momentum online and in-store.

Alrosa: Gokhran Sale Has Cooled Rough Prices

Rough-diamond prices have fallen by up to 5% on the secondary market since Russia’s state gem depository released a stockpile of goods last month, according to Alrosa.

India Sees Highest Polished Exports Since Feb. 2019

India’s polished-diamond exports continued to exceed pre-pandemic levels in July as the market extended its recovery.



Global Diamond Production will rise to 113m carats in 2021

Global production of rough diamonds will increase by 1.4 per cent to almost 113m carats this year, according to data and analytics company GlobalData.

Slowdown: IDEX Polished Price Index is Stable in August

The IDEX Polished Price Index remained virtually static, albeit with slight rises at the start and end of August.  It closed the month up by just 0.42 per cent, a slowdown from 2.20 per cent in June and 1.49 per cent in July. It also increased during April and May.

IDEX Price Report for 1 September: Many 3-ct Rounds Rise, Fancies Flat

There was a raft of price rises among low-clarity 3.00-3.99 ct rounds and clusters of drops in some smaller goods during August. Little movement for fancies.



Diamonds On The Blockchain: A Sustainable Way For Everyone To Invest And Hedge Against Inflation

For the first time, Diamond Standard has made diamonds available as an asset to investors and fund managers, which is marked-to-market daily. These commodities are approved to settle futures being listed on the CME Globex, and options being listed on MIAX Options Exchange.

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