How much does a 2.00 to 2.99ct J SI2 natural round diamond cost?

As of October 2026, 2.00 to 2.99ct J SI2 natural round diamonds typically cost $8,830 AUD to $26,941 AUD, with a median price of $15,638 AUD. There are currently 769 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct J SI2 Natural Round

Quick answer

As of October 2026, there are 769 natural round diamonds with J colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $8,830 AUD to $26,941 AUD, with a median of $15,638 AUD. At least 55 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between $5,028 AUD and $7,973 AUD per carat. The same specification in lab grown form lists at a median of about $2,059 AUD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +8.4%.

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 natural stones in the index: 2,248 USD per carat, +7.6% 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

769

Lowest Price

$4,465 AUD

Highest Price

$56,427 AUD

Average Price

$17,008 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

40.1%

Price Spread

46.1%

30-Day Price Trend

-1.8%

30-Day Supply Change

+8.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,487/ct

10th Percentile

$2,738

Median

$4,487

90th Percentile

$6,802

Score Distribution

2.1K diamonds scored across 4 quality tiers

Excellent

315 (15.1%)

Very Good

542 (26.0%)

Good

354 (17.0%)

Average

876 (42.0%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J I1I1 inclusions are not visible without magnification

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Lab-Grown J SI2Same specifications, lab-grown origin

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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