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

As of September 2026, 3.00 to 4.99ct J SI2 natural oval diamonds typically cost $18,676 AUD to $66,606 AUD, with a median price of $33,603 AUD. There are currently 505 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct J SI2 Natural Oval

Quick answer

As of September 2026, there are 505 natural oval diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $18,676 AUD to $66,606 AUD, with a median of $33,603 AUD. At least 42 retailers stock this exact specification. Half of all listings fall between $7,838 AUD and $12,594 AUD per carat. The same specification in lab grown form lists at a median of about $6,924 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

505

Lowest Price

$11,276 AUD

Highest Price

$201,955 AUD

Average Price

$39,359 AUD

Market Intelligence

Retailers Selling

Price Spread

46.6%

Price Range

Price per carat distribution across retailers

$6,629/ct

10th Percentile

$3,762

Median

$6,629

90th Percentile

$9,518

Score Distribution

505 diamonds scored across 4 quality tiers

Excellent

30 (5.9%)

Very Good

189 (37.4%)

Good

136 (26.9%)

Average

150 (29.7%)

Find Your Diamond

Search 505 J SI2 oval diamonds and compare prices.

Search Diamonds

Consider Instead

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

Lab-Grown J SI2Same specifications, lab-grown origin

Save 54%

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