How much does a 3.00 to 4.99ct G VS1 lab grown cushion diamond cost?

As of October 2026, 3.00 to 4.99ct G VS1 lab grown cushion diamonds typically cost £386 GBP to £3,392 GBP, with a median price of £1,128 GBP. There are currently 1,652 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 90%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G VS1 Lab Grown Cushion

Quick answer

As of October 2026, there are 1,652 lab grown cushion diamonds with G colour and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £386 GBP to £3,392 GBP, with a median of £1,128 GBP. At least 59 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 90%. Half of all listings fall between £229 GBP and £593 GBP per carat. The same specification in natural form lists at a median of about £13,926 GBP per carat. Over the last 30 days the median price moved +25.4% and the number of listings moved -1.8%.

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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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

1,652

Lowest Price

£298 GBP

Highest Price

£6,982 GBP

Average Price

£1,485 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

39.0%

Price Spread

90.5%

30-Day Price Trend

+25.4%

30-Day Supply Change

-1.8%

Volatility (30d)

0.08

Price Range

Price per carat distribution across retailers

$539/ct

10th Percentile

$229

Median

$539

90th Percentile

$1,104

Score Distribution

3.5K diamonds scored across 4 quality tiers

Excellent

1,099 (31.0%)

Very Good

474 (13.4%)

Good

1,001 (28.2%)

Average

975 (27.5%)

Find Your Diamond

Search 1,652 G VS1 cushion diamonds and compare prices.

Search Diamonds

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