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

As of November 2026, 3.00 to 4.99ct F SI1 natural marquise diamonds typically cost $54,104 AUD to $106,863 AUD, with a median price of $70,981 AUD. There are currently 16 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI1 Natural Marquise

Quick answer

As of November 2026, there are 16 natural marquise diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $54,104 AUD to $106,863 AUD, with a median of $70,981 AUD. At least 53 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between $20,460 AUD and $26,290 AUD per carat. The same specification in lab grown form lists at a median of about $586 AUD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +29.6%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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: November 2026

Available

Lowest Price

$45,862 AUD

Highest Price

$174,571 AUD

Average Price

$78,873 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

37.8%

Price Spread

24.9%

30-Day Price Trend

-1.0%

30-Day Supply Change

+29.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$16,456/ct

10th Percentile

$12,601

Median

$16,456

90th Percentile

$20,699

Score Distribution

61 diamonds scored across 4 quality tiers

Excellent

3 (4.9%)

Very Good

16 (26.2%)

Good

17 (27.9%)

Average

25 (41.0%)

Find Your Diamond

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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 15%

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