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

As of October 2026, 1.00 to 1.49ct D IF lab grown radiant diamonds typically cost £164 GBP to £1,064 GBP, with a median price of £315 GBP. There are currently 784 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 118%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D IF Lab Grown Radiant

Quick answer

As of October 2026, there are 784 lab grown radiant diamonds with D colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £164 GBP to £1,064 GBP, with a median of £315 GBP. At least 50 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 118%. Half of all listings fall between £244 GBP and £756 GBP per carat. The same specification in natural form lists at a median of about £5,504 GBP per carat. Over the last 30 days the median price moved -3.9% and the number of listings moved +18.2%.

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

784

Lowest Price

£130 GBP

Highest Price

£3,064 GBP

Average Price

£493 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

41.8%

Price Spread

118.0%

30-Day Price Trend

-3.9%

30-Day Supply Change

+18.2%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$582/ct

10th Percentile

$221

Median

$582

90th Percentile

$1,402

Score Distribution

1.7K diamonds scored across 5 quality tiers

Exceptional

17 (1.0%)

Excellent

638 (37.4%)

Very Good

528 (31.0%)

Good

407 (23.9%)

Average

114 (6.7%)

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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