How much does a 3.00 to 4.99ct I IF lab grown princess diamond cost?

As of October 2026, 3.00 to 4.99ct I IF lab grown princess diamonds typically cost £6,704 GBP to £19,445 GBP, with a median price of £12,302 GBP. There are currently 1 diamonds matching this specification available across retailers.

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

About 20% of these diamonds are available at multiple retailers, with an average price spread of 28%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I IF Lab Grown Princess

Quick answer

As of October 2026, there are 1 lab grown princess diamonds with I colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £6,704 GBP to £19,445 GBP, with a median of £12,302 GBP. At least 16 retailers stock this exact specification, and 20% of the stones appear at more than one of them, with an average price spread of 28%. Half of all listings fall between £1,704 GBP and £2,230 GBP per carat. The same specification in natural form lists at a median of about £9,305 GBP per carat.

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

3.81ct Princess I IF, IGI, grade A, from £5,664 GBP

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

£5,664 GBP

Highest Price

£25,335 GBP

Average Price

£12,854 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

20.0%

Price Spread

27.5%

Price Range

Price per carat distribution across retailers

$2,543/ct

10th Percentile

$2,139

Median

$2,543

90th Percentile

$3,533

Score Distribution

4 diamonds scored across 2 quality tiers

Excellent

1 (25.0%)

Good

3 (75.0%)

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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