How much does a 3.00 to 4.99ct J IF lab grown round diamond cost?

As of September 2026, 3.00 to 4.99ct J IF lab grown round diamonds typically cost $43,926 AUD to $131,910 AUD, with a median price of $73,896 AUD. There are currently 9 diamonds matching this specification available across retailers.

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

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

3.00 to 4.99ct J IF Lab Grown Round

Quick answer

As of September 2026, there are 9 lab grown round diamonds with J colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $43,926 AUD to $131,910 AUD, with a median of $73,896 AUD. At least 5 retailers stock this exact specification. Half of all listings fall between $8,314 AUD and $15,066 AUD per carat. The same specification in natural form lists at a median of about $16,964 AUD per carat.

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

4.07ct Round J IF, GIA, score 76 of 100, from $111,717 AUD

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. Round lab grown stones in the index: 438 USD per carat, -14.1% 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

Lowest Price

$26,725 AUD

Highest Price

$143,841 AUD

Average Price

$81,479 AUD

Market Intelligence

Retailers Selling

Price Spread

59.8%

Price Range

Price per carat distribution across retailers

$8,098/ct

10th Percentile

$5,229

Median

$8,098

90th Percentile

$13,283

Score Distribution

9 diamonds scored across 4 quality tiers

Excellent

1 (11.1%)

Very Good

1 (11.1%)

Good

1 (11.1%)

Average

6 (66.7%)

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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