How much does a 3.00 to 4.99ct D SI1 lab grown heart diamond cost?

As of October 2026, 3.00 to 4.99ct D SI1 lab grown heart diamonds typically cost €370 EUR to €1,547 EUR, with a median price of €579 EUR. There are currently 5 diamonds matching this specification available across retailers.

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

About 44% of these diamonds are available at multiple retailers, with an average price spread of 104%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI1 Lab Grown Heart

Quick answer

As of October 2026, there are 5 lab grown heart diamonds with D colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €370 EUR to €1,547 EUR, with a median of €579 EUR. At least 34 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 104%. Half of all listings fall between €184 EUR and €547 EUR per carat. The same specification in natural form lists at a median of about €10,329 EUR per carat. Over the last 30 days the median price moved -10.0% and the number of listings moved +28.5%.

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. Heart lab grown stones in the index: 421 USD per carat, -1.8% 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

€336 EUR

Highest Price

€4,259 EUR

Average Price

€899 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

44.4%

Price Spread

104.1%

30-Day Price Trend

-10.0%

30-Day Supply Change

+28.5%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$388/ct

10th Percentile

$154

Median

$388

90th Percentile

$1,090

Score Distribution

9 diamonds scored across 4 quality tiers

Excellent

4 (44.4%)

Very Good

1 (11.1%)

Good

1 (11.1%)

Average

3 (33.3%)

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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