How much does a 3.00 to 4.99ct I VS2 lab grown cushion diamond cost?

As of September 2026, 3.00 to 4.99ct I VS2 lab grown cushion diamonds typically cost £662 GBP to £5,772 GBP, with a median price of £2,449 GBP. There are currently 104 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS2 cushion diamond?

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3.00 to 4.99ct I VS2 Lab Grown Cushion

Quick answer

As of September 2026, there are 104 lab grown cushion diamonds with I colour and VS2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £662 GBP to £5,772 GBP, with a median of £2,449 GBP. At least 33 retailers stock this exact specification. Half of all listings fall between £268 GBP and £935 GBP per carat. The same specification in natural form lists at a median of about £11,266 GBP 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. Cushion lab grown stones in the index: 466 USD per carat, -14.7% 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

104

Lowest Price

£493 GBP

Highest Price

£53,803 GBP

Average Price

£3,699 GBP

Market Intelligence

Retailers Selling

Price Spread

127.3%

Price Range

Price per carat distribution across retailers

$665/ct

10th Percentile

$262

Median

$665

90th Percentile

$1,951

Score Distribution

104 diamonds scored across 4 quality tiers

Excellent

8 (7.7%)

Very Good

22 (21.2%)

Good

21 (20.2%)

Average

53 (51.0%)

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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