How much does a 0.50 to 0.74ct J SI1 natural radiant diamond cost?

As of October 2026, 0.50 to 0.74ct J SI1 natural radiant diamonds typically cost €437 EUR to €963 EUR, with a median price of €653 EUR. There are currently 52 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 radiant diamond?

About 29% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct J SI1 Natural Radiant

Quick answer

As of October 2026, there are 52 natural radiant diamonds with J colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €437 EUR to €963 EUR, with a median of €653 EUR. At least 46 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between €857 EUR and €1,350 EUR per carat. Over the last 30 days the median price moved +0.7% and the number of listings moved +20.4%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Radiant natural stones in the index: 3,091 USD per carat, +13.2% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

€242 EUR

Highest Price

€2,082 EUR

Average Price

€690 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

28.6%

Price Spread

46.0%

30-Day Price Trend

+0.7%

30-Day Supply Change

+20.4%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,197/ct

10th Percentile

$815

Median

$1,197

90th Percentile

$2,050

Score Distribution

193 diamonds scored across 4 quality tiers

Excellent

20 (10.4%)

Very Good

30 (15.5%)

Good

40 (20.7%)

Average

103 (53.4%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1