How much does a 1.00 to 1.49ct J IF lab grown round diamond cost?

As of September 2026, 1.00 to 1.49ct J IF lab grown round diamonds typically cost £1,811 GBP to £5,997 GBP, with a median price of £3,519 GBP. There are currently 67 diamonds matching this specification available across retailers.

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1.00 to 1.49ct J IF Lab Grown Round

Quick answer

As of September 2026, there are 67 lab grown round diamonds with J colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,811 GBP to £5,997 GBP, with a median of £3,519 GBP. At least 9 retailers stock this exact specification. Half of all listings fall between £1,927 GBP and £3,514 GBP per carat. The same specification in natural form lists at a median of about £2,523 GBP per carat.

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. Round lab grown stones in the index: 438 USD per carat, -14.1% 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

£940 GBP

Highest Price

£10,053 GBP

Average Price

£3,713 GBP

Market Intelligence

Retailers Selling

Price Spread

64.9%

Price Range

Price per carat distribution across retailers

$3,104/ct

10th Percentile

$2,035

Median

$3,104

90th Percentile

$5,717

Score Distribution

67 diamonds scored across 4 quality tiers

Excellent

4 (6.0%)

Very Good

22 (32.8%)

Good

8 (11.9%)

Average

33 (49.3%)

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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