How much does a 0.50 to 0.74ct H SI2 lab grown marquise diamond cost?

As of November 2026, 0.50 to 0.74ct H SI2 lab grown marquise diamonds typically cost €150 EUR to €332 EUR, with a median price of €231 EUR. There are currently 5 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 marquise diamond?

About 80% of these diamonds are available at multiple retailers, with an average price spread of 178%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct H SI2 Lab Grown Marquise

Quick answer

As of November 2026, there are 5 lab grown marquise diamonds with H color and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €150 EUR to €332 EUR, with a median of €231 EUR. At least 12 retailers stock this exact specification, and 80% of the stones appear at more than one of them, with an average price spread of 178%. Half of all listings fall between €511 EUR and €1,518 EUR per carat. The same specification in natural form lists at a median of about €1,197 EUR per carat. Over the last 30 days the median price moved 0.0% and the number of listings moved +4.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise lab grown stones in the index: 505 USD per carat, +1.6% 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: November 2026

Available

Lowest Price

€126 EUR

Highest Price

€1,167 EUR

Average Price

€235 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

80.0%

Price Spread

177.9%

30-Day Price Trend

0.0%

30-Day Supply Change

+4.5%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$635/ct

10th Percentile

$476

Median

$635

90th Percentile

$2,021

Score Distribution

5 diamonds scored across 3 quality tiers

Excellent

2 (40.0%)

Very Good

2 (40.0%)

Good

1 (20.0%)

Find Your Diamond

Search 5 H SI2 marquise diamonds and compare prices.

Search Diamonds

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