How much does a 3.00 to 4.99ct I IF natural marquise diamond cost?

As of October 2026, 3.00 to 4.99ct I IF natural marquise diamonds typically cost $44,637 CAD to $119,611 CAD, with a median price of $73,814 CAD. There are currently 5 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 18%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I IF Natural Marquise

Quick answer

As of October 2026, there are 5 natural marquise diamonds with I color and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $44,637 CAD to $119,611 CAD, with a median of $73,814 CAD. At least 16 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 18%. Half of all listings fall between $19,385 CAD and $23,309 CAD per carat. The same specification in lab grown form lists at a median of about $2,185 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

$34,856 CAD

Highest Price

$243,753 CAD

Average Price

$78,420 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

41.7%

Price Spread

17.6%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$15,928/ct

10th Percentile

$12,803

Median

$15,928

90th Percentile

$18,034

Score Distribution

9 diamonds scored across 3 quality tiers

Excellent

3 (33.3%)

Very Good

1 (11.1%)

Good

5 (55.6%)

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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