How much does a 1.50 to 1.99ct I I1 natural cushion diamond cost?

As of November 2026, 1.50 to 1.99ct I I1 natural cushion diamonds typically cost €2,732 EUR to €6,087 EUR, with a median price of €4,307 EUR. There are currently 24 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 cushion diamond?

About 6% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I I1 Natural Cushion

Quick answer

As of November 2026, there are 24 natural cushion diamonds with I color and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €2,732 EUR to €6,087 EUR, with a median of €4,307 EUR. At least 23 retailers stock this exact specification, and 6% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between €2,215 EUR and €3,151 EUR per carat. Over the last 30 days the median price moved -0.0% and the number of listings moved +1.3%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

€1,799 EUR

Highest Price

€7,402 EUR

Average Price

€4,406 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

6.1%

Price Spread

34.1%

30-Day Price Trend

-0.0%

30-Day Supply Change

+1.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,063/ct

10th Percentile

$2,032

Median

$3,063

90th Percentile

$3,865

Score Distribution

163 diamonds scored across 4 quality tiers

Excellent

9 (5.5%)

Very Good

9 (5.5%)

Good

12 (7.4%)

Average

133 (81.6%)

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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