How much does a 1.50 to 1.99ct H SI1 natural heart diamond cost?

As of November 2026, 1.50 to 1.99ct H SI1 natural heart diamonds typically cost $6,766 NZD to $20,905 NZD, with a median price of $11,553 NZD. There are currently 192 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI1 Natural Heart

Quick answer

As of November 2026, there are 192 natural heart diamonds with H colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $6,766 NZD to $20,905 NZD, with a median of $11,553 NZD. At least 59 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $5,167 NZD and $8,658 NZD per carat. The same specification in lab grown form lists at a median of about $820 NZD per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +10.6%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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

192

Lowest Price

$3,982 NZD

Highest Price

$33,303 NZD

Average Price

$12,725 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

33.7%

Price Spread

54.1%

30-Day Price Trend

-1.9%

30-Day Supply Change

+10.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,639/ct

10th Percentile

$2,480

Median

$3,639

90th Percentile

$6,135

Score Distribution

627 diamonds scored across 4 quality tiers

Excellent

93 (14.8%)

Very Good

78 (12.4%)

Good

113 (18.0%)

Average

343 (54.7%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

H SI2SI2 inclusions are not visible without magnification

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Lab-Grown H SI1Same specifications, lab-grown origin

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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