How much does a 1.50 to 1.99ct I IF natural marquise diamond cost?

As of October 2026, 1.50 to 1.99ct I IF natural marquise diamonds typically cost €6,393 EUR to €10,302 EUR, with a median price of €7,906 EUR. There are currently 9 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 32%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I IF Natural Marquise

Quick answer

As of October 2026, there are 9 natural marquise diamonds with I colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €6,393 EUR to €10,302 EUR, with a median of €7,906 EUR. At least 46 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between €5,489 EUR and €7,529 EUR per carat. The same specification in lab grown form lists at a median of about €571 EUR per carat. Over the last 30 days the median price moved -5.5% and the number of listings moved +38.4%.

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 natural stones in the index: 2,268 USD per carat, +10.8% 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

Lowest Price

€5,169 EUR

Highest Price

€16,892 EUR

Average Price

€8,131 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

40.9%

Price Spread

32.2%

30-Day Price Trend

-5.5%

30-Day Supply Change

+38.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$7,055/ct

10th Percentile

$5,377

Median

$7,055

90th Percentile

$9,987

Score Distribution

28 diamonds scored across 4 quality tiers

Excellent

11 (39.3%)

Very Good

9 (32.1%)

Good

6 (21.4%)

Average

2 (7.1%)

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Consider Instead

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

J IFJ colour is visually identical to I to the naked eye

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Lab-Grown I IFSame specifications, lab-grown origin

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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