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 HK$45,367 HKD to HK$143,565 HKD, with a median price of HK$80,699 HKD. There are currently 668 diamonds matching this specification available across retailers.

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

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2.00 to 2.99ct I SI2 Natural Cushion

Quick answer

As of September 2026, there are 668 natural cushion diamonds with I colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run HK$45,367 HKD to HK$143,565 HKD, with a median of HK$80,699 HKD. At least 46 retailers stock this exact specification. Half of all listings fall between HK$29,456 HKD and HK$49,740 HKD per carat. The same specification in lab grown form lists at a median of about HK$37,360 HKD 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

668

Lowest Price

HK$20,637 HKD

Highest Price

HK$351,207 HKD

Average Price

HK$90,442 HKD

Market Intelligence

Retailers Selling

Price Spread

52.5%

Price Range

Price per carat distribution across retailers

$4,921/ct

10th Percentile

$2,991

Median

$4,921

90th Percentile

$7,502

Score Distribution

668 diamonds scored across 4 quality tiers

Excellent

103 (15.4%)

Very Good

223 (33.4%)

Good

176 (26.3%)

Average

166 (24.9%)

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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 27%

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