How much does a 5.00ct+ F SI2 natural marquise diamond cost?

As of October 2026, 5.00ct+ F SI2 natural marquise diamonds typically cost $58,445 CAD to $107,620 CAD, with a median price of $89,479 CAD. There are currently 2 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI2 Natural Marquise

Quick answer

As of October 2026, there are 2 natural marquise diamonds with F color and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $58,445 CAD to $107,620 CAD, with a median of $89,479 CAD. At least 20 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between $18,685 CAD and $29,641 CAD per carat. The same specification in lab grown form lists at a median of about $332 CAD per carat.

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: October 2026

Available

Lowest Price

$45,294 CAD

Highest Price

$162,690 CAD

Average Price

$84,874 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

31.3%

Price Spread

40.9%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$19,181/ct

10th Percentile

$10,621

Median

$19,181

90th Percentile

$23,434

Score Distribution

4 diamonds scored across 3 quality tiers

Excellent

2 (50.0%)

Very Good

1 (25.0%)

Good

1 (25.0%)

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Consider Instead

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

Lab-Grown F SI2Same specifications, lab-grown origin

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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