How much does a 5.00ct+ I I1 natural marquise diamond cost?

As of September 2026, 5.00ct+ I I1 natural marquise diamonds typically cost $44,256 CAD to $110,596 CAD, with a median price of $76,427 CAD. There are currently 5 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 marquise diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ I I1 Natural Marquise

Quick answer

As of September 2026, there are 5 natural marquise diamonds with I color and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $44,256 CAD to $110,596 CAD, with a median of $76,427 CAD. At least 8 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 63%. Half of all listings fall between $8,654 CAD and $15,240 CAD 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

$36,273 CAD

Highest Price

$132,516 CAD

Average Price

$77,144 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

36.4%

Price Spread

62.9%

Price Range

Price per carat distribution across retailers

$7,749/ct

10th Percentile

$5,282

Median

$7,749

90th Percentile

$12,401

Score Distribution

5 diamonds scored across 2 quality tiers

Very Good

2 (40.0%)

Good

3 (60.0%)

Find Your Diamond

Search 5 I I1 marquise diamonds and compare prices.

Search Diamonds

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