How much does a 0.50 to 0.74ct F SI2 natural heart diamond cost?

As of October 2026, 0.50 to 0.74ct F SI2 natural heart diamonds typically cost £306 GBP to £961 GBP, with a median price of £466 GBP. There are currently 231 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 35%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI2 Natural Heart

Quick answer

As of October 2026, there are 231 natural heart diamonds with F colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £306 GBP to £961 GBP, with a median of £466 GBP. At least 49 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 35%. Half of all listings fall between £788 GBP and £1,091 GBP per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved +3.4%.

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

231

Lowest Price

£261 GBP

Highest Price

£1,580 GBP

Average Price

£553 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

31.2%

Price Spread

34.9%

30-Day Price Trend

-2.0%

30-Day Supply Change

+3.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,158/ct

10th Percentile

$931

Median

$1,158

90th Percentile

$2,027

Score Distribution

569 diamonds scored across 4 quality tiers

Excellent

113 (19.9%)

Very Good

70 (12.3%)

Good

153 (26.9%)

Average

233 (40.9%)

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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