How much does a 3.00 to 4.99ct F SI1 natural round diamond cost?

As of October 2026, 3.00 to 4.99ct F SI1 natural round diamonds typically cost $48,213 SGD to $122,190 SGD, with a median price of $77,313 SGD. There are currently 165 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 30%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI1 Natural Round

Quick answer

As of October 2026, there are 165 natural round diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $48,213 SGD to $122,190 SGD, with a median of $77,313 SGD. At least 61 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 30%. Half of all listings fall between $16,721 SGD and $22,491 SGD per carat. The same specification in lab grown form lists at a median of about $495 SGD per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +8.1%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

165

Lowest Price

$27,972 SGD

Highest Price

$223,628 SGD

Average Price

$81,507 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

28.0%

Price Spread

29.6%

30-Day Price Trend

-1.5%

30-Day Supply Change

+8.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$15,233/ct

10th Percentile

$11,282

Median

$15,233

90th Percentile

$20,399

Score Distribution

489 diamonds scored across 4 quality tiers

Excellent

35 (7.2%)

Very Good

122 (24.9%)

Good

108 (22.1%)

Average

224 (45.8%)

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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 26%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 97%

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