How much does a 1.50 to 1.99ct F SI2 natural radiant diamond cost?

As of October 2026, 1.50 to 1.99ct F SI2 natural radiant diamonds typically cost €3,953 EUR to €11,254 EUR, with a median price of €6,137 EUR. There are currently 100 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 radiant diamond?

About 36% 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 F SI2 Natural Radiant

Quick answer

As of October 2026, there are 100 natural radiant diamonds with F colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,953 EUR to €11,254 EUR, with a median of €6,137 EUR. At least 55 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between €2,959 EUR and €5,045 EUR per carat. The same specification in lab grown form lists at a median of about €320 EUR per carat. Over the last 30 days the median price moved -2.2% and the number of listings moved +17.9%.

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

100

Lowest Price

€2,355 EUR

Highest Price

€16,042 EUR

Average Price

€7,040 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

36.5%

Price Spread

53.7%

30-Day Price Trend

-2.2%

30-Day Supply Change

+17.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,321/ct

10th Percentile

$2,670

Median

$4,321

90th Percentile

$6,965

Score Distribution

313 diamonds scored across 4 quality tiers

Excellent

60 (19.2%)

Very Good

60 (19.2%)

Good

64 (20.4%)

Average

129 (41.2%)

Find Your Diamond

Search 100 F SI2 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown F SI2Same specifications, lab-grown origin

Save 92%

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