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

As of October 2026, 1.50 to 1.99ct F SI1 natural heart diamonds typically cost $5,899 SGD to $18,559 SGD, with a median price of $12,112 SGD. There are currently 82 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 61%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI1 Natural Heart

Quick answer

As of October 2026, there are 82 natural heart diamonds with F colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $5,899 SGD to $18,559 SGD, with a median of $12,112 SGD. At least 59 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 61%. Half of all listings fall between $4,420 SGD and $7,828 SGD per carat. The same specification in lab grown form lists at a median of about $455 SGD per carat. Over the last 30 days the median price moved -2.8% and the number of listings moved +16.2%.

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

$4,075 SGD

Highest Price

$29,075 SGD

Average Price

$12,234 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

29.9%

Price Spread

60.5%

30-Day Price Trend

-2.8%

30-Day Supply Change

+16.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,402/ct

10th Percentile

$2,865

Median

$4,402

90th Percentile

$7,539

Score Distribution

338 diamonds scored across 4 quality tiers

Excellent

34 (10.1%)

Very Good

41 (12.1%)

Good

49 (14.5%)

Average

214 (63.3%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 25%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 92%

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