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

As of November 2026, 3.00 to 4.99ct H SI1 lab grown heart diamonds typically cost $1,451 NZD to $13,339 NZD, with a median price of $3,431 NZD. There are currently 8 diamonds matching this specification available across retailers.

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

About 44% of these diamonds are available at multiple retailers, with an average price spread of 119%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 8 lab grown heart diamonds with H colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,451 NZD to $13,339 NZD, with a median of $3,431 NZD. At least 27 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 119%. Half of all listings fall between $681 NZD and $2,591 NZD per carat. The same specification in natural form lists at a median of about $16,433 NZD per carat. Over the last 30 days the median price moved -7.5% and the number of listings moved +2.1%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Heart lab grown stones in the index: 428 USD per carat, +1.4% 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: November 2026

Available

Lowest Price

$939 NZD

Highest Price

$33,473 NZD

Average Price

$5,091 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

44.4%

Price Spread

119.0%

30-Day Price Trend

-7.5%

30-Day Supply Change

+2.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$903/ct

10th Percentile

$295

Median

$903

90th Percentile

$2,658

Score Distribution

15 diamonds scored across 4 quality tiers

Excellent

3 (20.0%)

Very Good

6 (40.0%)

Good

3 (20.0%)

Average

3 (20.0%)

Find Your Diamond

Search 8 H SI1 heart diamonds and compare prices.

Search Diamonds

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