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

As of September 2026, 3.00 to 4.99ct F SI1 natural marquise diamonds typically cost $57,967 AUD to $107,673 AUD, with a median price of $77,036 AUD. There are currently 61 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct F SI1 Natural Marquise

Quick answer

As of September 2026, there are 61 natural marquise diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $57,967 AUD to $107,673 AUD, with a median of $77,036 AUD. At least 42 retailers stock this exact specification. Half of all listings fall between $21,046 AUD and $27,010 AUD per carat. The same specification in lab grown form lists at a median of about $462 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$35,169 AUD

Highest Price

$194,494 AUD

Average Price

$81,795 AUD

Market Intelligence

Retailers Selling

Price Spread

24.6%

Price Range

Price per carat distribution across retailers

$17,227/ct

10th Percentile

$12,587

Median

$17,227

90th Percentile

$20,944

Score Distribution

61 diamonds scored across 4 quality tiers

Excellent

3 (4.9%)

Very Good

9 (14.8%)

Good

26 (42.6%)

Average

23 (37.7%)

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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 19%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 98%

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