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

As of October 2026, 1.00 to 1.49ct G IF lab grown radiant diamonds typically cost £148 GBP to £1,143 GBP, with a median price of £473 GBP. There are currently 9 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 122%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G IF Lab Grown Radiant

Quick answer

As of October 2026, there are 9 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 £148 GBP to £1,143 GBP, with a median of £473 GBP. At least 41 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 122%. Half of all listings fall between £209 GBP and £740 GBP per carat. The same specification in natural form lists at a median of about £4,219 GBP per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +26.5%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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

Lowest Price

£143 GBP

Highest Price

£3,747 GBP

Average Price

£591 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

42.5%

Price Spread

122.0%

30-Day Price Trend

-2.1%

30-Day Supply Change

+26.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$579/ct

10th Percentile

$202

Median

$579

90th Percentile

$1,425

Score Distribution

26 diamonds scored across 4 quality tiers

Excellent

6 (23.1%)

Very Good

4 (15.4%)

Good

6 (23.1%)

Average

10 (38.5%)

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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