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

As of October 2026, 2.00 to 2.99ct J SI1 natural round diamonds typically cost $7,880 USD to $22,367 USD, with a median price of $12,865 USD. There are currently 674 diamonds matching this specification available across retailers.

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

About 38% 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 Natural Round

Quick answer

As of October 2026, there are 674 natural round diamonds with J color and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $7,880 USD to $22,367 USD, with a median of $12,865 USD. At least 60 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $4,083 USD and $6,305 USD per carat. The same specification in lab grown form lists at a median of about $1,223 USD 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

674

Lowest Price

$3,705 USD

Highest Price

$39,759 USD

Average Price

$13,997 USD

Market Intelligence

Retailers Selling

Cross Retailer %

38.3%

Price Spread

43.6%

30-Day Price Trend

-1.8%

30-Day Supply Change

+8.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,098/ct

10th Percentile

$3,315

Median

$5,098

90th Percentile

$7,605

Score Distribution

1.9K diamonds scored across 4 quality tiers

Excellent

181 (9.6%)

Very Good

423 (22.4%)

Good

361 (19.1%)

Average

925 (48.9%)

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

Save 12%

Lab-Grown J SI1Same specifications, lab-grown origin

Save 76%

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