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

As of October 2026, 2.00 to 2.99ct I SI2 lab grown round diamonds typically cost $1,549 NZD to $7,782 NZD, with a median price of $2,742 NZD. There are currently 153 diamonds matching this specification available across retailers.

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

About 51% 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 Lab Grown Round

Quick answer

As of October 2026, there are 153 lab grown round diamonds with I colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $1,549 NZD to $7,782 NZD, with a median of $2,742 NZD. At least 22 retailers stock this exact specification, and 51% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between $2,307 NZD and $3,607 NZD per carat. The same specification in natural form lists at a median of about $12,112 NZD per carat. Over the last 30 days the median price moved +0.4% and the number of listings moved -2.0%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

153

Lowest Price

$372 NZD

Highest Price

$17,988 NZD

Average Price

$4,384 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

51.3%

Price Spread

52.9%

30-Day Price Trend

+0.4%

30-Day Supply Change

-2.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,382/ct

10th Percentile

$469

Median

$1,382

90th Percentile

$2,166

Score Distribution

272 diamonds scored across 4 quality tiers

Excellent

142 (52.2%)

Very Good

12 (4.4%)

Good

104 (38.2%)

Average

14 (5.1%)

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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