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

As of September 2026, 3.00 to 4.99ct J SI2 lab grown heart diamonds typically cost $12,481 CAD to $49,798 CAD, with a median price of $31,857 CAD. There are currently 7 diamonds matching this specification available across retailers.

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3.00 to 4.99ct J SI2 Lab Grown Heart

Quick answer

As of September 2026, there are 7 lab grown heart diamonds with J color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $12,481 CAD to $49,798 CAD, with a median of $31,857 CAD. At least 5 retailers stock this exact specification. Half of all listings fall between $5,920 CAD and $10,402 CAD per carat. The same specification in natural form lists at a median of about $11,795 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

$12,162 CAD

Highest Price

$58,681 CAD

Average Price

$29,631 CAD

Market Intelligence

Retailers Selling

Price Spread

48.4%

Price Range

Price per carat distribution across retailers

$6,856/ct

10th Percentile

$3,310

Median

$6,856

90th Percentile

$8,505

Score Distribution

7 diamonds scored across 1 quality tiers

Average

7 (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