How much does a 1.50 to 1.99ct D SI1 lab grown princess diamond cost?

As of November 2026, 1.50 to 1.99ct D SI1 lab grown princess diamonds typically cost €235 EUR to €1,065 EUR, with a median price of €601 EUR. There are currently 20 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 106%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI1 Lab Grown Princess

Quick answer

As of November 2026, there are 20 lab grown princess diamonds with D color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €235 EUR to €1,065 EUR, with a median of €601 EUR. At least 33 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 106%. Half of all listings fall between €199 EUR and €544 EUR per carat. The same specification in natural form lists at a median of about €4,243 EUR per carat. Over the last 30 days the median price moved +2.6% and the number of listings moved +16.7%.

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

€168 EUR

Highest Price

€2,538 EUR

Average Price

€651 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

39.7%

Price Spread

106.3%

30-Day Price Trend

+2.6%

30-Day Supply Change

+16.7%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$363/ct

10th Percentile

$153

Median

$363

90th Percentile

$789

Score Distribution

53 diamonds scored across 4 quality tiers

Excellent

16 (30.2%)

Very Good

8 (15.1%)

Good

4 (7.5%)

Average

25 (47.2%)

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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