How much does a 2.00 to 2.99ct J SI1 lab grown round diamond cost?

As of October 2026, 2.00 to 2.99ct J SI1 lab grown round diamonds typically cost $1,721 NZD to $6,464 NZD, with a median price of $2,661 NZD. There are currently 507 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 round diamond?

About 55% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J SI1 Lab Grown Round

Quick answer

As of October 2026, there are 507 lab grown round diamonds with J colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $1,721 NZD to $6,464 NZD, with a median of $2,661 NZD. At least 21 retailers stock this exact specification, and 55% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $2,033 NZD and $2,986 NZD per carat. The same specification in natural form lists at a median of about $10,312 NZD per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved +1.2%.

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. 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

507

Lowest Price

$557 NZD

Highest Price

$16,037 NZD

Average Price

$3,687 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

54.9%

Price Spread

43.9%

30-Day Price Trend

-0.3%

30-Day Supply Change

+1.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,224/ct

10th Percentile

$875

Median

$1,224

90th Percentile

$1,964

Score Distribution

889 diamonds scored across 4 quality tiers

Excellent

404 (45.4%)

Very Good

92 (10.3%)

Good

325 (36.6%)

Average

68 (7.6%)

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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