How much does a 5.00ct+ I VS1 lab grown princess diamond cost?

As of October 2026, 5.00ct+ I VS1 lab grown princess diamonds typically cost £701 GBP to £2,481 GBP, with a median price of £1,461 GBP. There are currently 15 diamonds matching this specification available across retailers.

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

About 45% of these diamonds are available at multiple retailers, with an average price spread of 100%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ I VS1 Lab Grown Princess

Quick answer

As of October 2026, there are 15 lab grown princess diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £701 GBP to £2,481 GBP, with a median of £1,461 GBP. At least 29 retailers stock this exact specification, and 45% of the stones appear at more than one of them, with an average price spread of 100%. Half of all listings fall between £230 GBP and £550 GBP per carat. The same specification in natural form lists at a median of about £11,415 GBP per carat. Over the last 30 days the median price moved -5.3% and the number of listings moved +40.9%.

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

£597 GBP

Highest Price

£6,601 GBP

Average Price

£1,682 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

44.7%

Price Spread

100.0%

30-Day Price Trend

-5.3%

30-Day Supply Change

+40.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$426/ct

10th Percentile

$263

Median

$426

90th Percentile

$1,491

Score Distribution

22 diamonds scored across 4 quality tiers

Excellent

5 (22.7%)

Very Good

8 (36.4%)

Good

5 (22.7%)

Average

4 (18.2%)

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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