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 $887 SGD to $1,927 SGD, with a median price of $1,600 SGD. There are currently 2 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 89%. 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 2 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 $887 SGD to $1,927 SGD, with a median of $1,600 SGD. At least 17 retailers stock this exact specification, and 17% of the stones appear at more than one of them, with an average price spread of 89%. Half of all listings fall between $264 SGD and $592 SGD per carat. The same specification in natural form lists at a median of about $7,666 SGD per carat. Over the last 30 days the median price moved +13.3% and the number of listings moved +14.1%.

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

3.01ct Heart G SI2, IGI, grade A, from $709 SGD

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

$709 SGD

Highest Price

$4,269 SGD

Average Price

$1,439 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

16.7%

Price Spread

88.8%

30-Day Price Trend

+13.3%

30-Day Supply Change

+14.1%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$289/ct

10th Percentile

$143

Median

$289

90th Percentile

$665

Score Distribution

5 diamonds scored across 4 quality tiers

Excellent

1 (20.0%)

Very Good

1 (20.0%)

Good

1 (20.0%)

Average

2 (40.0%)

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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