How much does a 1.00 to 1.49ct H SI1 lab grown heart diamond cost?

As of November 2026, 1.00 to 1.49ct H SI1 lab grown heart diamonds typically cost $778 NZD to $2,552 NZD, with a median price of $1,497 NZD. There are currently 7 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 73%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct H SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 7 lab grown heart diamonds with H colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $778 NZD to $2,552 NZD, with a median of $1,497 NZD. At least 15 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 73%. Half of all listings fall between $1,767 NZD and $3,272 NZD per carat. The same specification in natural form lists at a median of about $4,358 NZD per carat. Over the last 30 days the median price moved -4.2% and the number of listings moved -2.3%.

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

$525 NZD

Highest Price

$4,174 NZD

Average Price

$1,653 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

34.8%

Price Spread

73.4%

30-Day Price Trend

-4.2%

30-Day Supply Change

-2.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,152/ct

10th Percentile

$609

Median

$1,152

90th Percentile

$2,408

Score Distribution

10 diamonds scored across 4 quality tiers

Excellent

2 (20.0%)

Very Good

2 (20.0%)

Good

5 (50.0%)

Average

1 (10.0%)

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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