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 €388 EUR to €2,788 EUR, with a median price of €1,211 EUR. There are currently 10 diamonds matching this specification available across retailers.

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

About 25% 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 10 lab grown round diamonds with D colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €388 EUR to €2,788 EUR, with a median of €1,211 EUR. At least 29 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 98%. Half of all listings fall between €196 EUR and €475 EUR per carat. The same specification in natural form lists at a median of about €14,070 EUR per carat. Over the last 30 days the median price moved +8.8% and the number of listings moved +15.3%.

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 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

€361 EUR

Highest Price

€4,622 EUR

Average Price

€1,417 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

24.6%

Price Spread

97.7%

30-Day Price Trend

+8.8%

30-Day Supply Change

+15.3%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$317/ct

10th Percentile

$149

Median

$317

90th Percentile

$686

Score Distribution

35 diamonds scored across 4 quality tiers

Excellent

8 (22.9%)

Very Good

3 (8.6%)

Good

7 (20.0%)

Average

17 (48.6%)

Find Your Diamond

Search 10 D SI2 round diamonds and compare prices.

Search Diamonds

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