How much does a 2.00 to 2.99ct I SI2 natural cushion diamond cost?

As of November 2026, 2.00 to 2.99ct I SI2 natural cushion diamonds typically cost €5,556 EUR to €17,405 EUR, with a median price of €9,741 EUR. There are currently 329 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI2 Natural Cushion

Quick answer

As of November 2026, there are 329 natural cushion diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run €5,556 EUR to €17,405 EUR, with a median of €9,741 EUR. At least 52 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between €3,249 EUR and €5,528 EUR per carat. The same specification in lab grown form lists at a median of about €1,704 EUR per carat. Over the last 30 days the median price moved -1.2% and the number of listings moved +4.8%.

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

329

Lowest Price

€3,097 EUR

Highest Price

€40,074 EUR

Average Price

€10,886 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

33.1%

Price Spread

53.5%

30-Day Price Trend

-1.2%

30-Day Supply Change

+4.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,760/ct

10th Percentile

$2,950

Median

$4,760

90th Percentile

$7,322

Score Distribution

736 diamonds scored across 4 quality tiers

Excellent

162 (22.0%)

Very Good

187 (25.4%)

Good

135 (18.3%)

Average

252 (34.2%)

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Consider Instead

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

J SI2J colour is visually identical to I to the naked eye

Save 26%

Lab-Grown I SI2Same specifications, lab-grown origin

Save 60%

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