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

As of October 2026, 1.00 to 1.49ct J SI1 natural heart diamonds typically cost $1,827 CAD to $5,443 CAD, with a median price of $2,984 CAD. There are currently 264 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI1 Natural Heart

Quick answer

As of October 2026, there are 264 natural heart diamonds with J color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,827 CAD to $5,443 CAD, with a median of $2,984 CAD. At least 58 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between $2,023 CAD and $3,537 CAD per carat. The same specification in lab grown form lists at a median of about $1,264 CAD per carat. Over the last 30 days the median price moved -5.3% and the number of listings moved +17.1%.

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

264

Lowest Price

$1,218 CAD

Highest Price

$9,821 CAD

Average Price

$3,357 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

41.1%

Price Spread

58.7%

30-Day Price Trend

-5.3%

30-Day Supply Change

+17.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,842/ct

10th Percentile

$1,227

Median

$1,842

90th Percentile

$3,345

Score Distribution

705 diamonds scored across 4 quality tiers

Excellent

105 (14.9%)

Very Good

123 (17.4%)

Good

154 (21.8%)

Average

323 (45.8%)

Find Your Diamond

Search 264 J SI1 heart diamonds and compare prices.

Search Diamonds

Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

Save 6%

Lab-Grown J SI1Same specifications, lab-grown origin

Save 51%

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