How much does a 3.00 to 4.99ct D SI1 natural round diamond cost?

As of October 2026, 3.00 to 4.99ct D SI1 natural round diamonds typically cost €37,014 EUR to €88,072 EUR, with a median price of €53,394 EUR. There are currently 187 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 round diamond?

About 31% of these diamonds are available at multiple retailers, with an average price spread of 31%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI1 Natural Round

Quick answer

As of October 2026, there are 187 natural round diamonds with D color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €37,014 EUR to €88,072 EUR, with a median of €53,394 EUR. At least 57 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 31%. Half of all listings fall between €13,073 EUR and €17,683 EUR per carat. The same specification in lab grown form lists at a median of about €316 EUR per carat. Over the last 30 days the median price moved +0.7% and the number of listings moved +7.6%.

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: October 2026

Available

187

Lowest Price

€20,900 EUR

Highest Price

€165,992 EUR

Average Price

€58,475 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

31.5%

Price Spread

30.6%

30-Day Price Trend

+0.7%

30-Day Supply Change

+7.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$16,861/ct

10th Percentile

$12,680

Median

$16,861

90th Percentile

$23,613

Score Distribution

459 diamonds scored across 4 quality tiers

Excellent

52 (11.3%)

Very Good

109 (23.7%)

Good

113 (24.6%)

Average

185 (40.3%)

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Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same specifications, lab-grown origin

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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