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

As of November 2026, 1.50 to 1.99ct F SI2 natural round diamonds typically cost €3,077 EUR to €10,947 EUR, with a median price of €5,527 EUR. There are currently 1,349 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI2 Natural Round

Quick answer

As of November 2026, there are 1,349 natural round diamonds with F color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,077 EUR to €10,947 EUR, with a median of €5,527 EUR. At least 62 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between €2,689 EUR and €4,774 EUR per carat. The same specification in lab grown form lists at a median of about €398 EUR per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +14.1%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

1,349

Lowest Price

€1,541 EUR

Highest Price

€25,041 EUR

Average Price

€6,297 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

43.0%

Price Spread

56.5%

30-Day Price Trend

-1.4%

30-Day Supply Change

+14.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,123/ct

10th Percentile

$2,430

Median

$4,123

90th Percentile

$6,803

Score Distribution

2.8K diamonds scored across 4 quality tiers

Excellent

778 (27.9%)

Very Good

779 (28.0%)

Good

510 (18.3%)

Average

718 (25.8%)

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Consider Instead

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

F I1I1 inclusions are not visible without magnification

Save 17%

Lab-Grown F SI2Same specifications, lab-grown origin

Save 89%

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