How much does a 3.00 to 4.99ct J I1 lab grown oval diamond cost?

As of September 2026, 3.00 to 4.99ct J I1 lab grown oval diamonds typically cost $13,780 AUD to $30,702 AUD, with a median price of $16,418 AUD. There are currently 92 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 oval diamond?

About 2% of these diamonds are available at multiple retailers, with an average price spread of 19%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J I1 Lab Grown Oval

Quick answer

As of September 2026, there are 92 lab grown oval diamonds with J colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $13,780 AUD to $30,702 AUD, with a median of $16,418 AUD. At least 2 retailers stock this exact specification, and 2% of the stones appear at more than one of them, with an average price spread of 19%. Half of all listings fall between $4,840 AUD and $5,776 AUD per carat. The same specification in natural form lists at a median of about $12,068 AUD per carat. Over the last 30 days the median price moved -11.4% and the number of listings moved -32.2%.

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 lab grown stones in the index: 487 USD per carat, -11.2% 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

$13,485 AUD

Highest Price

$64,918 AUD

Average Price

$20,974 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

1.6%

Price Spread

19.3%

30-Day Price Trend

-11.4%

30-Day Supply Change

-32.2%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$3,452/ct

10th Percentile

$3,448

Median

$3,452

90th Percentile

$4,122

Score Distribution

92 diamonds scored across 3 quality tiers

Very Good

1 (1.1%)

Good

74 (80.4%)

Average

17 (18.5%)

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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