How much does a 3.00 to 4.99ct D SI2 lab grown round diamond cost?

As of October 2026, 3.00 to 4.99ct D SI2 lab grown round diamonds typically cost €386 EUR to €2,778 EUR, with a median price of €1,207 EUR. There are currently 8 diamonds matching this specification available across retailers.

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

About 23% of these diamonds are available at multiple retailers, with an average price spread of 98%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI2 Lab Grown Round

Quick answer

As of October 2026, there are 8 lab grown round diamonds with D color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €386 EUR to €2,778 EUR, with a median of €1,207 EUR. At least 30 retailers stock this exact specification, and 23% of the stones appear at more than one of them, with an average price spread of 98%. Half of all listings fall between €197 EUR and €475 EUR per carat. The same specification in natural form lists at a median of about €14,029 EUR per carat. Over the last 30 days the median price moved +6.6% and the number of listings moved +19.9%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

Lowest Price

€360 EUR

Highest Price

€4,605 EUR

Average Price

€1,411 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

23.2%

Price Spread

97.6%

30-Day Price Trend

+6.6%

30-Day Supply Change

+19.9%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$318/ct

10th Percentile

$150

Median

$318

90th Percentile

$668

Score Distribution

28 diamonds scored across 4 quality tiers

Excellent

8 (28.6%)

Very Good

2 (7.1%)

Good

6 (21.4%)

Average

12 (42.9%)

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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