How much does a 1.00 to 1.49ct J SI1 natural heart diamond cost?

As of September 2026, 1.00 to 1.49ct J SI1 natural heart diamonds typically cost $2,277 NZD to $6,663 NZD, with a median price of $3,551 NZD. There are currently 669 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct J SI1 Natural Heart

Quick answer

As of September 2026, there are 669 natural heart diamonds with J colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,277 NZD to $6,663 NZD, with a median of $3,551 NZD. At least 50 retailers stock this exact specification. Half of all listings fall between $2,567 NZD and $3,866 NZD per carat. The same specification in lab grown form lists at a median of about $2,563 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 natural stones in the index: 2,261 USD per carat, +1.7% 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

669

Lowest Price

$1,310 NZD

Highest Price

$11,671 NZD

Average Price

$4,036 NZD

Market Intelligence

Retailers Selling

Price Spread

42.2%

Price Range

Price per carat distribution across retailers

$1,760/ct

10th Percentile

$1,234

Median

$1,760

90th Percentile

$2,755

Score Distribution

669 diamonds scored across 4 quality tiers

Excellent

58 (8.7%)

Very Good

162 (24.2%)

Good

164 (24.5%)

Average

285 (42.6%)

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Consider Instead

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

Lab-Grown J SI1Same specifications, lab-grown origin

Save 21%

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