How much does a 5.00ct+ J VS1 lab grown radiant diamond cost?

As of September 2026, 5.00ct+ J VS1 lab grown radiant diamonds typically cost £7,458 GBP to £10,640 GBP, with a median price of £8,160 GBP. There are currently 11 diamonds matching this specification available across retailers.

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

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5.00ct+ J VS1 Lab Grown Radiant

Quick answer

As of September 2026, there are 11 lab grown radiant diamonds with J colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £7,458 GBP to £10,640 GBP, with a median of £8,160 GBP. At least 9 retailers stock this exact specification. Half of all listings fall between £865 GBP and £8,700 GBP per carat. The same specification in natural form lists at a median of about £13,585 GBP per carat.

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

21.51ct Radiant J VS1, IGI, score 77 of 100, from £6,750 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. Radiant lab grown stones in the index: 473 USD per carat, -12.5% 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

£6,750 GBP

Highest Price

£23,141 GBP

Average Price

£9,110 GBP

Market Intelligence

Retailers Selling

Price Spread

159.8%

Price Range

Price per carat distribution across retailers

$6,618/ct

10th Percentile

$515

Median

$6,618

90th Percentile

$12,421

Score Distribution

11 diamonds scored across 2 quality tiers

Very Good

3 (27.3%)

Good

8 (72.7%)

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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