How much does a 3.00 to 4.99ct G SI2 lab grown heart diamond cost?

As of October 2026, 3.00 to 4.99ct G SI2 lab grown heart diamonds typically cost $911 AUD to $2,094 AUD, with a median price of $1,487 AUD. There are currently 1 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 heart diamond?

About 17% of these diamonds are available at multiple retailers, with an average price spread of 100%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI2 Lab Grown Heart

Quick answer

As of October 2026, there are 1 lab grown heart diamonds with G colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $911 AUD to $2,094 AUD, with a median of $1,487 AUD. At least 18 retailers stock this exact specification, and 17% of the stones appear at more than one of them, with an average price spread of 100%. Half of all listings fall between $278 AUD and $654 AUD per carat. The same specification in natural form lists at a median of about $10,177 AUD per carat. Over the last 30 days the median price moved +12.7% and the number of listings moved +8.5%.

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

3.01ct Heart G SI2, IGI, grade A, from $787 AUD

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. Heart lab grown stones in the index: 421 USD per carat, -1.8% 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

$787 AUD

Highest Price

$4,260 AUD

Average Price

$1,498 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

16.7%

Price Spread

100.1%

30-Day Price Trend

+12.7%

30-Day Supply Change

+8.5%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$264/ct

10th Percentile

$136

Median

$264

90th Percentile

$650

Score Distribution

4 diamonds scored across 3 quality tiers

Excellent

1 (25.0%)

Good

1 (25.0%)

Average

2 (50.0%)

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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