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

As of September 2026, 3.00 to 4.99ct G SI1 lab grown princess diamonds typically cost €492 EUR to €6,483 EUR, with a median price of €1,022 EUR. There are currently 113 diamonds matching this specification available across retailers.

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3.00 to 4.99ct G SI1 Lab Grown Princess

Quick answer

As of September 2026, there are 113 lab grown princess diamonds with G colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €492 EUR to €6,483 EUR, with a median of €1,022 EUR. At least 26 retailers stock this exact specification. Half of all listings fall between €234 EUR and €825 EUR per carat. The same specification in natural form lists at a median of about €10,470 EUR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Princess lab grown stones in the index: 481 USD per carat, -7.3% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

113

Lowest Price

€274 EUR

Highest Price

€114,431 EUR

Average Price

€2,556 EUR

Market Intelligence

Retailers Selling

Price Spread

173.4%

Price Range

Price per carat distribution across retailers

$395/ct

10th Percentile

$205

Median

$395

90th Percentile

$2,154

Score Distribution

113 diamonds scored across 4 quality tiers

Excellent

13 (11.5%)

Very Good

30 (26.5%)

Good

32 (28.3%)

Average

38 (33.6%)

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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