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

As of October 2026, 2.00 to 2.99ct I SI2 natural cushion diamonds typically cost $6,142 USD to $19,910 USD, with a median price of $10,925 USD. There are currently 350 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 54%. 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 October 2026, there are 350 natural cushion diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $6,142 USD to $19,910 USD, with a median of $10,925 USD. At least 52 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $3,622 USD and $6,196 USD per carat. The same specification in lab grown form lists at a median of about $1,908 USD per carat. Over the last 30 days the median price moved -1.5% 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: October 2026

Available

350

Lowest Price

$3,460 USD

Highest Price

$44,771 USD

Average Price

$12,193 USD

Market Intelligence

Retailers Selling

Cross Retailer %

32.5%

Price Spread

54.1%

30-Day Price Trend

-1.5%

30-Day Supply Change

+4.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$4,760/ct

10th Percentile

$2,913

Median

$4,760

90th Percentile

$7,357

Score Distribution

811 diamonds scored across 4 quality tiers

Excellent

170 (21.0%)

Very Good

215 (26.5%)

Good

169 (20.8%)

Average

257 (31.7%)

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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