How much does a 1.00 to 1.49ct G IF lab grown radiant diamond cost?

As of September 2026, 1.00 to 1.49ct G IF lab grown radiant diamonds typically cost £114 GBP to £1,220 GBP, with a median price of £368 GBP. There are currently 22 diamonds matching this specification available across retailers.

Where can I find the best price on a G IF radiant diamond?

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1.00 to 1.49ct G IF Lab Grown Radiant

Quick answer

As of September 2026, there are 22 lab grown radiant diamonds with G colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £114 GBP to £1,220 GBP, with a median of £368 GBP. At least 35 retailers stock this exact specification. Half of all listings fall between £291 GBP and £779 GBP per carat. The same specification in natural form lists at a median of about £3,835 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. 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

£90 GBP

Highest Price

£3,694 GBP

Average Price

£626 GBP

Market Intelligence

Retailers Selling

Price Spread

106.4%

Price Range

Price per carat distribution across retailers

$620/ct

10th Percentile

$277

Median

$620

90th Percentile

$1,569

Score Distribution

22 diamonds scored across 4 quality tiers

Excellent

6 (27.3%)

Very Good

6 (27.3%)

Good

3 (13.6%)

Average

7 (31.8%)

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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