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

As of October 2026, 1.50 to 1.99ct H SI2 natural heart diamonds typically cost £2,233 GBP to £6,929 GBP, with a median price of £3,815 GBP. There are currently 294 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI2 Natural Heart

Quick answer

As of October 2026, there are 294 natural heart diamonds with H colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £2,233 GBP to £6,929 GBP, with a median of £3,815 GBP. At least 52 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between £1,799 GBP and £3,073 GBP per carat. The same specification in lab grown form lists at a median of about £1,902 GBP per carat. Over the last 30 days the median price moved -3.5% and the number of listings moved +15.8%.

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

294

Lowest Price

£1,368 GBP

Highest Price

£13,914 GBP

Average Price

£4,266 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

38.6%

Price Spread

56.7%

30-Day Price Trend

-3.5%

30-Day Supply Change

+15.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,013/ct

10th Percentile

$2,013

Median

$3,013

90th Percentile

$5,361

Score Distribution

816 diamonds scored across 4 quality tiers

Excellent

173 (21.2%)

Very Good

137 (16.8%)

Good

166 (20.3%)

Average

340 (41.7%)

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Consider Instead

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

Lab-Grown H 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