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

As of November 2026, 3.00 to 4.99ct D SI1 lab grown princess diamonds typically cost €393 EUR to €2,873 EUR, with a median price of €927 EUR. There are currently 14 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 114%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI1 Lab Grown Princess

Quick answer

As of November 2026, there are 14 lab grown princess diamonds with D colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €393 EUR to €2,873 EUR, with a median of €927 EUR. At least 38 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 114%. Half of all listings fall between €183 EUR and €513 EUR per carat. The same specification in natural form lists at a median of about €12,139 EUR per carat. Over the last 30 days the median price moved -9.6% and the number of listings moved +29.4%.

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. Princess lab grown stones in the index: 461 USD per carat, -4.8% 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: November 2026

Available

Lowest Price

€367 EUR

Highest Price

€5,943 EUR

Average Price

€1,413 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

41.0%

Price Spread

113.5%

30-Day Price Trend

-9.6%

30-Day Supply Change

+29.4%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$325/ct

10th Percentile

$150

Median

$325

90th Percentile

$897

Score Distribution

27 diamonds scored across 4 quality tiers

Excellent

10 (37.0%)

Very Good

4 (14.8%)

Good

7 (25.9%)

Average

6 (22.2%)

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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