How much does a 1.50 to 1.99ct J SI1 natural radiant diamond cost?

As of November 2026, 1.50 to 1.99ct J SI1 natural radiant diamonds typically cost €2,792 EUR to €7,440 EUR, with a median price of €4,503 EUR. There are currently 168 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI1 Natural Radiant

Quick answer

As of November 2026, there are 168 natural radiant diamonds with J colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €2,792 EUR to €7,440 EUR, with a median of €4,503 EUR. At least 54 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between €2,136 EUR and €3,575 EUR per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +18.7%.

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: November 2026

Available

168

Lowest Price

€1,727 EUR

Highest Price

€14,664 EUR

Average Price

€4,940 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

40.5%

Price Spread

54.0%

30-Day Price Trend

-1.0%

30-Day Supply Change

+18.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,976/ct

10th Percentile

$2,003

Median

$2,976

90th Percentile

$4,870

Score Distribution

452 diamonds scored across 4 quality tiers

Excellent

73 (16.2%)

Very Good

79 (17.5%)

Good

78 (17.3%)

Average

222 (49.1%)

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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