How much does a 3.00 to 4.99ct J SI2 natural round diamond cost?

As of October 2026, 3.00 to 4.99ct J SI2 natural round diamonds typically cost $20,962 SGD to $64,541 SGD, with a median price of $37,291 SGD. There are currently 519 diamonds matching this specification available across retailers.

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

About 42% 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.

3.00 to 4.99ct J SI2 Natural Round

Quick answer

As of October 2026, there are 519 natural round diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $20,962 SGD to $64,541 SGD, with a median of $37,291 SGD. At least 50 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between $7,882 SGD and $12,080 SGD per carat. The same specification in lab grown form lists at a median of about $3,734 SGD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +11.0%.

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 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

519

Lowest Price

$11,378 SGD

Highest Price

$122,277 SGD

Average Price

$40,439 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

42.5%

Price Spread

42.0%

30-Day Price Trend

-1.3%

30-Day Supply Change

+11.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,826/ct

10th Percentile

$4,824

Median

$7,826

90th Percentile

$10,932

Score Distribution

1.4K diamonds scored across 4 quality tiers

Excellent

192 (14.1%)

Very Good

337 (24.8%)

Good

241 (17.7%)

Average

589 (43.3%)

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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