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

As of October 2026, 1.50 to 1.99ct J SI1 natural heart diamonds typically cost $2,851 USD to $9,357 USD, with a median price of $5,000 USD. There are currently 138 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI1 Natural Heart

Quick answer

As of October 2026, there are 138 natural heart diamonds with J color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $2,851 USD to $9,357 USD, with a median of $5,000 USD. At least 52 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 48%. Half of all listings fall between $2,151 USD and $3,444 USD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +17.9%.

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

138

Lowest Price

$2,178 USD

Highest Price

$12,397 USD

Average Price

$5,531 USD

Market Intelligence

Retailers Selling

Cross Retailer %

41.7%

Price Spread

47.9%

30-Day Price Trend

-0.8%

30-Day Supply Change

+17.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,702/ct

10th Percentile

$1,750

Median

$2,702

90th Percentile

$4,441

Score Distribution

419 diamonds scored across 4 quality tiers

Excellent

57 (13.6%)

Very Good

69 (16.5%)

Good

62 (14.8%)

Average

231 (55.1%)

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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