How much does a 1.50 to 1.99ct D IF lab grown radiant diamond cost?

As of October 2026, 1.50 to 1.99ct D IF lab grown radiant diamonds typically cost £236 GBP to £1,871 GBP, with a median price of £550 GBP. There are currently 738 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 110%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D IF Lab Grown Radiant

Quick answer

As of October 2026, there are 738 lab grown radiant diamonds with D colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £236 GBP to £1,871 GBP, with a median of £550 GBP. At least 53 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 110%. Half of all listings fall between £253 GBP and £751 GBP per carat. The same specification in natural form lists at a median of about £8,041 GBP per carat. Over the last 30 days the median price moved -11.4% and the number of listings moved +30.4%.

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

738

Lowest Price

£185 GBP

Highest Price

£5,333 GBP

Average Price

£824 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

42.7%

Price Spread

109.7%

30-Day Price Trend

-11.4%

30-Day Supply Change

+30.4%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$604/ct

10th Percentile

$229

Median

$604

90th Percentile

$1,702

Score Distribution

1.9K diamonds scored across 5 quality tiers

Exceptional

53 (2.8%)

Excellent

640 (33.3%)

Very Good

623 (32.4%)

Good

358 (18.6%)

Average

248 (12.9%)

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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