How much does a 0.20 to 0.49ct D IF lab grown round diamond cost?

As of October 2026, 0.20 to 0.49ct D IF lab grown round diamonds typically cost £90 GBP to £398 GBP, with a median price of £193 GBP. There are currently 631 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 114%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D IF Lab Grown Round

Quick answer

As of October 2026, there are 631 lab grown round diamonds with D colour and IF clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £90 GBP to £398 GBP, with a median of £193 GBP. At least 20 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 114%. Half of all listings fall between £335 GBP and £1,020 GBP per carat. The same specification in natural form lists at a median of about £1,787 GBP per carat. Over the last 30 days the median price moved -7.9% and the number of listings moved -6.0%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

631

Lowest Price

£48 GBP

Highest Price

£1,067 GBP

Average Price

£236 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

46.5%

Price Spread

113.9%

30-Day Price Trend

-7.9%

30-Day Supply Change

-6.0%

Volatility (30d)

0.08

Price Range

Price per carat distribution across retailers

$800/ct

10th Percentile

$354

Median

$800

90th Percentile

$1,721

Score Distribution

2.0K diamonds scored across 5 quality tiers

Exceptional

7 (0.4%)

Excellent

568 (28.7%)

Very Good

395 (19.9%)

Good

385 (19.4%)

Average

626 (31.6%)

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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