How much does a 3.00 to 4.99ct G I1 natural marquise diamond cost?

As of November 2026, 3.00 to 4.99ct G I1 natural marquise diamonds typically cost $55,220 CAD to $103,804 CAD, with a median price of $87,188 CAD. There are currently 1 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 117%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G I1 Natural Marquise

Quick answer

As of November 2026, there are 1 natural marquise diamonds with G color and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $55,220 CAD to $103,804 CAD, with a median of $87,188 CAD. At least 13 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 117%. Half of all listings fall between $2,337 CAD and $5,484 CAD per carat.

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

3.21ct Marquise G I1, GIA, grade B+, from $57,583 CAD

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

$51,676 CAD

Highest Price

$107,014 CAD

Average Price

$81,435 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

27.3%

Price Spread

116.7%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,931/ct

10th Percentile

$1,609

Median

$1,931

90th Percentile

$5,717

Score Distribution

7 diamonds scored across 3 quality tiers

Very Good

1 (14.3%)

Good

1 (14.3%)

Average

5 (71.4%)

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Search 1 G I1 marquise diamonds and compare prices.

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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