How much does a 1.50 to 1.99ct G SI2 natural marquise diamond cost?

As of November 2026, 1.50 to 1.99ct G SI2 natural marquise diamonds typically cost €3,215 EUR to €12,993 EUR, with a median price of €6,575 EUR. There are currently 217 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Natural Marquise

Quick answer

As of November 2026, there are 217 natural marquise diamonds with G colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,215 EUR to €12,993 EUR, with a median of €6,575 EUR. At least 52 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between €3,638 EUR and €6,103 EUR per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +12.6%.

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 natural stones in the index: 2,177 USD per carat, -4.2% 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: November 2026

Available

217

Lowest Price

€2,057 EUR

Highest Price

€26,925 EUR

Average Price

€7,411 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

36.0%

Price Spread

49.9%

30-Day Price Trend

-1.6%

30-Day Supply Change

+12.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,516/ct

10th Percentile

$3,065

Median

$5,516

90th Percentile

$8,637

Score Distribution

554 diamonds scored across 4 quality tiers

Excellent

138 (24.9%)

Very Good

156 (28.2%)

Good

112 (20.2%)

Average

148 (26.7%)

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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