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

As of September 2026, 2.00 to 2.99ct I SI2 natural cushion diamonds typically cost $5,781 USD to $18,178 USD, with a median price of $10,194 USD. There are currently 655 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

2.00 to 2.99ct I SI2 Natural Cushion

Quick answer

As of September 2026, there are 655 natural cushion diamonds with I color and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $5,781 USD to $18,178 USD, with a median of $10,194 USD. At least 46 retailers stock this exact specification. Half of all listings fall between $3,791 USD and $6,377 USD per carat. The same specification in lab grown form lists at a median of about $4,761 USD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

655

Lowest Price

$2,631 USD

Highest Price

$44,771 USD

Average Price

$11,433 USD

Market Intelligence

Retailers Selling

Price Spread

52.2%

Price Range

Price per carat distribution across retailers

$4,952/ct

10th Percentile

$3,025

Median

$4,952

90th Percentile

$7,489

Score Distribution

655 diamonds scored across 4 quality tiers

Excellent

100 (15.3%)

Very Good

224 (34.2%)

Good

182 (27.8%)

Average

149 (22.7%)

Find Your Diamond

Search 655 I SI2 cushion diamonds and compare prices.

Search Diamonds

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 28%

Lab-Grown I SI2Same specifications, lab-grown origin

Save 62%

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