How much does a 0.75 to 0.99ct D IF lab grown marquise diamond cost?

As of October 2026, 0.75 to 0.99ct D IF lab grown marquise diamonds typically cost £175 GBP to £1,126 GBP, with a median price of £390 GBP. There are currently 115 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 107%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D IF Lab Grown Marquise

Quick answer

As of October 2026, there are 115 lab grown marquise diamonds with D colour and IF clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £175 GBP to £1,126 GBP, with a median of £390 GBP. At least 46 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 107%. Half of all listings fall between £325 GBP and £905 GBP per carat. The same specification in natural form lists at a median of about £3,823 GBP per carat. Over the last 30 days the median price moved +1.9% and the number of listings moved +16.5%.

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. 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

115

Lowest Price

£148 GBP

Highest Price

£2,427 GBP

Average Price

£498 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

37.3%

Price Spread

107.0%

30-Day Price Trend

+1.9%

30-Day Supply Change

+16.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$723/ct

10th Percentile

$307

Median

$723

90th Percentile

$1,647

Score Distribution

320 diamonds scored across 5 quality tiers

Exceptional

5 (1.6%)

Excellent

115 (35.9%)

Very Good

85 (26.6%)

Good

78 (24.4%)

Average

37 (11.6%)

Find Your Diamond

Search 115 D IF marquise diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

D VVS1VVS1 inclusions are not visible without magnification

Save 24%

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