How much does a 0.50 to 0.74ct D IF lab grown marquise diamond cost?

As of October 2026, 0.50 to 0.74ct D IF lab grown marquise diamonds typically cost £137 GBP to £644 GBP, with a median price of £364 GBP. There are currently 183 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 92%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct D IF Lab Grown Marquise

Quick answer

As of October 2026, there are 183 lab grown marquise diamonds with D colour and IF clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £137 GBP to £644 GBP, with a median of £364 GBP. At least 44 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 92%. Half of all listings fall between £409 GBP and £1,024 GBP per carat. The same specification in natural form lists at a median of about £2,062 GBP per carat. Over the last 30 days the median price moved +1.6% and the number of listings moved +13.8%.

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. Marquise lab grown stones in the index: 485 USD per carat, -3.2% 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

183

Lowest Price

£107 GBP

Highest Price

£2,073 GBP

Average Price

£372 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

38.2%

Price Spread

91.7%

30-Day Price Trend

+1.6%

30-Day Supply Change

+13.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$892/ct

10th Percentile

$364

Median

$892

90th Percentile

$1,856

Score Distribution

565 diamonds scored across 5 quality tiers

Exceptional

7 (1.2%)

Excellent

193 (34.2%)

Very Good

87 (15.4%)

Good

188 (33.3%)

Average

90 (15.9%)

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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