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

As of October 2026, 2.00 to 2.99ct I SI2 lab grown cushion diamonds typically cost HK$8,239 HKD to HK$30,624 HKD, with a median price of HK$19,655 HKD. There are currently 26 diamonds matching this specification available across retailers.

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

About 53% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI2 Lab Grown Cushion

Quick answer

As of October 2026, there are 26 lab grown cushion diamonds with I colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run HK$8,239 HKD to HK$30,624 HKD, with a median of HK$19,655 HKD. At least 12 retailers stock this exact specification, and 53% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between HK$10,067 HKD and HK$16,285 HKD per carat. The same specification in natural form lists at a median of about HK$48,163 HKD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +2.2%.

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 lab grown stones in the index: 516 USD per carat, +6.9% 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

Lowest Price

HK$5,907 HKD

Highest Price

HK$75,430 HKD

Average Price

HK$21,120 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

52.8%

Price Spread

41.5%

30-Day Price Trend

-0.1%

30-Day Supply Change

+2.2%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$1,908/ct

10th Percentile

$525

Median

$1,908

90th Percentile

$3,611

Score Distribution

49 diamonds scored across 4 quality tiers

Excellent

17 (34.7%)

Very Good

6 (12.2%)

Good

18 (36.7%)

Average

8 (16.3%)

Find Your Diamond

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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