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

As of October 2026, 3.00 to 4.99ct J SI2 lab grown oval diamonds typically cost $68,178 AUD to $68,178 AUD, with a median price of $68,178 AUD. There are currently 2 diamonds matching this specification available across retailers.

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

About 67% of these diamonds are available at multiple retailers, with an average price spread of 17%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J SI2 Lab Grown Oval

Quick answer

As of October 2026, there are 2 lab grown oval diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $68,178 AUD to $68,178 AUD, with a median of $68,178 AUD. At least 9 retailers stock this exact specification, and 67% of the stones appear at more than one of them, with an average price spread of 17%. Half of all listings fall between $3,955 AUD and $4,695 AUD per carat. The same specification in natural form lists at a median of about $10,066 AUD per carat. Over the last 30 days the median price moved -5.8% and the number of listings moved -17.3%.

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. Oval lab grown stones in the index: 453 USD per carat, -7.4% 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

Lowest Price

$68,178 AUD

Highest Price

$68,178 AUD

Average Price

$68,178 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

66.7%

Price Spread

16.6%

30-Day Price Trend

-5.8%

30-Day Supply Change

-17.3%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$3,141/ct

10th Percentile

$2,434

Median

$3,141

90th Percentile

$4,740

Score Distribution

2 diamonds scored across 1 quality tiers

Average

2 (100.0%)

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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