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

As of October 2026, 3.00 to 4.99ct D SI1 lab grown princess diamonds typically cost $455 USD to $3,210 USD, with a median price of $1,071 USD. 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 40% of these diamonds are available at multiple retailers, with an average price spread of 116%. 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 October 2026, there are 14 lab grown princess diamonds with D color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $455 USD to $3,210 USD, with a median of $1,071 USD. At least 37 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 116%. Half of all listings fall between $208 USD and $590 USD per carat. The same specification in natural form lists at a median of about $13,994 USD per carat. Over the last 30 days the median price moved -4.3% and the number of listings moved +31.0%.

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: October 2026

Available

Lowest Price

$410 USD

Highest Price

$6,640 USD

Average Price

$1,581 USD

Market Intelligence

Retailers Selling

Cross Retailer %

40.4%

Price Spread

115.5%

30-Day Price Trend

-4.3%

30-Day Supply Change

+31.0%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$331/ct

10th Percentile

$153

Median

$331

90th Percentile

$925

Score Distribution

29 diamonds scored across 4 quality tiers

Excellent

10 (34.5%)

Very Good

4 (13.8%)

Good

8 (27.6%)

Average

7 (24.1%)

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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