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

As of September 2026, 3.00 to 4.99ct I IF lab grown princess diamonds typically cost £6,054 GBP to £24,667 GBP, with a median price of £8,005 GBP. There are currently 4 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct I IF Lab Grown Princess

Quick answer

As of September 2026, there are 4 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 £6,054 GBP to £24,667 GBP, with a median of £8,005 GBP. At least 11 retailers stock this exact specification. Half of all listings fall between £1,776 GBP and £2,574 GBP per carat. The same specification in natural form lists at a median of about £10,124 GBP per carat.

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

3.81ct Princess I IF, IGI, score 80 of 100, from £5,594 GBP

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

Lowest Price

£5,594 GBP

Highest Price

£31,432 GBP

Average Price

£13,259 GBP

Market Intelligence

Retailers Selling

Price Spread

36.3%

Price Range

Price per carat distribution across retailers

$2,967/ct

10th Percentile

$2,197

Median

$2,967

90th Percentile

$4,373

Score Distribution

4 diamonds scored across 4 quality tiers

Excellent

1 (25.0%)

Very Good

1 (25.0%)

Good

1 (25.0%)

Average

1 (25.0%)

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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