How much does a 3.00 to 4.99ct G SI1 lab grown heart diamond cost?

As of October 2026, 3.00 to 4.99ct G SI1 lab grown heart diamonds typically cost $628 CAD to $4,111 CAD, with a median price of $1,944 CAD. There are currently 10 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 heart diamond?

About 43% of these diamonds are available at multiple retailers, with an average price spread of 86%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI1 Lab Grown Heart

Quick answer

As of October 2026, there are 10 lab grown heart diamonds with G color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $628 CAD to $4,111 CAD, with a median of $1,944 CAD. At least 35 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 86%. Half of all listings fall between $366 CAD and $916 CAD per carat. The same specification in natural form lists at a median of about $14,947 CAD per carat. Over the last 30 days the median price moved +15.8% and the number of listings moved +13.0%.

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

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

$538 CAD

Highest Price

$6,828 CAD

Average Price

$2,265 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

43.3%

Price Spread

85.7%

30-Day Price Trend

+15.8%

30-Day Supply Change

+13.0%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$460/ct

10th Percentile

$161

Median

$460

90th Percentile

$1,062

Score Distribution

28 diamonds scored across 4 quality tiers

Excellent

8 (28.6%)

Very Good

4 (14.3%)

Good

2 (7.1%)

Average

14 (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