How much does a 0.20 to 0.49ct D SI2 natural round diamond cost?

As of November 2026, 0.20 to 0.49ct D SI2 natural round diamonds typically cost €287 EUR to €857 EUR, with a median price of €517 EUR. There are currently 7,872 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI2 Natural Round

Quick answer

As of November 2026, there are 7,872 natural round diamonds with D color and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €287 EUR to €857 EUR, with a median of €517 EUR. At least 34 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between €994 EUR and €1,682 EUR per carat. The same specification in lab grown form lists at a median of about €568 EUR per carat. Over the last 30 days the median price moved -3.9% and the number of listings moved +10.3%.

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

7,872

Lowest Price

€80 EUR

Highest Price

€2,256 EUR

Average Price

€558 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

32.9%

Price Spread

55.2%

30-Day Price Trend

-3.9%

30-Day Supply Change

+10.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,391/ct

10th Percentile

$883

Median

$1,391

90th Percentile

$3,923

Score Distribution

11.5K diamonds scored across 4 quality tiers

Excellent

2,348 (20.4%)

Very Good

4,010 (34.8%)

Good

3,210 (27.9%)

Average

1,951 (16.9%)

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Consider Instead

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

D I1I1 inclusions are not visible without magnification

Save 7%

Lab-Grown D SI2Same specifications, lab-grown origin

Save 55%

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