How much does a 1.50 to 1.99ct J SI2 natural heart diamond cost?

As of October 2026, 1.50 to 1.99ct J SI2 natural heart diamonds typically cost $3,681 AUD to $10,049 AUD, with a median price of $5,763 AUD. There are currently 173 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 heart diamond?

About 43% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI2 Natural Heart

Quick answer

As of October 2026, there are 173 natural heart diamonds with J colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,681 AUD to $10,049 AUD, with a median of $5,763 AUD. At least 48 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between $2,913 AUD and $4,616 AUD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +16.8%.

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: October 2026

Available

173

Lowest Price

$2,159 AUD

Highest Price

$16,895 AUD

Average Price

$6,362 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

42.5%

Price Spread

46.7%

30-Day Price Trend

-1.1%

30-Day Supply Change

+16.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,563/ct

10th Percentile

$1,753

Median

$2,563

90th Percentile

$4,312

Score Distribution

472 diamonds scored across 4 quality tiers

Excellent

94 (19.9%)

Very Good

69 (14.6%)

Good

91 (19.3%)

Average

218 (46.2%)

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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