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

As of October 2026, 1.50 to 1.99ct D SI2 natural heart diamonds typically cost $3,874 USD to $12,677 USD, with a median price of $6,450 USD. There are currently 74 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI2 Natural Heart

Quick answer

As of October 2026, there are 74 natural heart diamonds with D color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,874 USD to $12,677 USD, with a median of $6,450 USD. At least 49 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between $2,967 USD and $5,082 USD per carat. The same specification in lab grown form lists at a median of about $472 USD per carat. Over the last 30 days the median price moved +0.1% and the number of listings moved +10.2%.

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

Lowest Price

$2,922 USD

Highest Price

$26,060 USD

Average Price

$7,538 USD

Market Intelligence

Retailers Selling

Cross Retailer %

35.1%

Price Spread

56.3%

30-Day Price Trend

+0.1%

30-Day Supply Change

+10.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,757/ct

10th Percentile

$2,455

Median

$3,757

90th Percentile

$6,478

Score Distribution

214 diamonds scored across 4 quality tiers

Excellent

55 (25.7%)

Very Good

31 (14.5%)

Good

38 (17.8%)

Average

90 (42.1%)

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Consider Instead

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

Lab-Grown D SI2Same 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