How much does a 0.20 to 0.49ct G I1 natural marquise diamond cost?

As of November 2026, 0.20 to 0.49ct G I1 natural marquise diamonds typically cost $277 USD to $834 USD, with a median price of $514 USD. There are currently 14 diamonds matching this specification available across retailers.

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

About 45% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G I1 Natural Marquise

Quick answer

As of November 2026, there are 14 natural marquise diamonds with G color and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $277 USD to $834 USD, with a median of $514 USD. At least 13 retailers stock this exact specification, and 45% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between $1,038 USD and $1,695 USD 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: November 2026

Available

Lowest Price

$191 USD

Highest Price

$1,286 USD

Average Price

$528 USD

Market Intelligence

Retailers Selling

Cross Retailer %

45.5%

Price Spread

51.0%

Price Range

Price per carat distribution across retailers

$1,289/ct

10th Percentile

$943

Median

$1,289

90th Percentile

$2,880

Score Distribution

63 diamonds scored across 4 quality tiers

Excellent

3 (4.8%)

Very Good

5 (7.9%)

Good

8 (12.7%)

Average

47 (74.6%)

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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