How much does a 3.00 to 4.99ct I VS1 lab grown princess diamond cost?

As of October 2026, 3.00 to 4.99ct I VS1 lab grown princess diamonds typically cost £398 GBP to £4,897 GBP, with a median price of £1,479 GBP. There are currently 84 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 princess diamond?

About 26% of these diamonds are available at multiple retailers, with an average price spread of 177%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Lab Grown Princess

Quick answer

As of October 2026, there are 84 lab grown princess diamonds with I colour and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £398 GBP to £4,897 GBP, with a median of £1,479 GBP. At least 44 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 177%. Half of all listings fall between £232 GBP and £985 GBP per carat. The same specification in natural form lists at a median of about £8,396 GBP per carat. Over the last 30 days the median price moved +3.5% and the number of listings moved +5.3%.

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

£272 GBP

Highest Price

£14,433 GBP

Average Price

£2,108 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

25.9%

Price Spread

177.4%

30-Day Price Trend

+3.5%

30-Day Supply Change

+5.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$565/ct

10th Percentile

$187

Median

$565

90th Percentile

$3,289

Score Distribution

133 diamonds scored across 4 quality tiers

Excellent

41 (30.8%)

Very Good

28 (21.1%)

Good

28 (21.1%)

Average

36 (27.1%)

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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