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

As of September 2026, 3.00 to 4.99ct J SI1 lab grown heart diamonds typically cost $11,121 CAD to $33,610 CAD, with a median price of $11,355 CAD. There are currently 11 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct J SI1 Lab Grown Heart

Quick answer

As of September 2026, there are 11 lab grown heart diamonds with J color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $11,121 CAD to $33,610 CAD, with a median of $11,355 CAD. At least 2 retailers stock this exact specification. Half of all listings fall between $3,197 CAD and $3,419 CAD per carat. The same specification in natural form lists at a median of about $14,617 CAD per carat.

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. Heart lab grown stones in the index: 440 USD per carat, -9.4% 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

$11,029 CAD

Highest Price

$72,037 CAD

Average Price

$20,814 CAD

Market Intelligence

Retailers Selling

Price Spread

6.8%

Price Range

Price per carat distribution across retailers

$2,337/ct

10th Percentile

$2,231

Median

$2,337

90th Percentile

$2,487

Score Distribution

11 diamonds scored across 2 quality tiers

Good

9 (81.8%)

Average

2 (18.2%)

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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