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

As of September 2026, 1.00 to 1.49ct E SI1 lab grown heart diamonds typically cost $378 NZD to $1,737 NZD, with a median price of $665 NZD. There are currently 91 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct E SI1 Lab Grown Heart

Quick answer

As of September 2026, there are 91 lab grown heart diamonds with E colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $378 NZD to $1,737 NZD, with a median of $665 NZD. At least 27 retailers stock this exact specification. Half of all listings fall between $526 NZD and $1,050 NZD per carat. The same specification in natural form lists at a median of about $5,098 NZD per carat.

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

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

$200 NZD

Highest Price

$8,541 NZD

Average Price

$1,123 NZD

Market Intelligence

Retailers Selling

Price Spread

80.3%

Price Range

Price per carat distribution across retailers

$376/ct

10th Percentile

$249

Median

$376

90th Percentile

$911

Score Distribution

91 diamonds scored across 4 quality tiers

Excellent

11 (12.1%)

Very Good

25 (27.5%)

Good

29 (31.9%)

Average

26 (28.6%)

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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