How much does a 5.00ct+ E SI1 lab grown heart diamond cost?

As of September 2026, 5.00ct+ E SI1 lab grown heart diamonds typically cost $1,096 NZD to $8,305 NZD, with a median price of $2,763 NZD. There are currently 32 diamonds matching this specification available across retailers.

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

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5.00ct+ E SI1 Lab Grown Heart

Quick answer

As of September 2026, there are 32 lab grown heart diamonds with E colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,096 NZD to $8,305 NZD, with a median of $2,763 NZD. At least 8 retailers stock this exact specification. Half of all listings fall between $674 NZD and $1,728 NZD per carat. The same specification in natural form lists at a median of about $42,038 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

$1,060 NZD

Highest Price

$51,324 NZD

Average Price

$4,783 NZD

Market Intelligence

Retailers Selling

Price Spread

88.7%

Price Range

Price per carat distribution across retailers

$684/ct

10th Percentile

$286

Median

$684

90th Percentile

$1,514

Score Distribution

32 diamonds scored across 4 quality tiers

Excellent

9 (28.1%)

Very Good

12 (37.5%)

Good

6 (18.8%)

Average

5 (15.6%)

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F SI1F colour is visually identical to E to the naked eye

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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