How much does a 0.20 to 0.49ct I IF natural marquise diamond cost?

As of October 2026, 0.20 to 0.49ct I IF natural marquise diamonds typically cost $305 USD to $733 USD, with a median price of $479 USD. There are currently 57 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct I IF Natural Marquise

Quick answer

As of October 2026, there are 57 natural marquise diamonds with I color and IF clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $305 USD to $733 USD, with a median of $479 USD. At least 41 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $1,277 USD and $1,873 USD per carat. Over the last 30 days the median price moved +1.1% and the number of listings moved +21.5%.

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

$249 USD

Highest Price

$1,541 USD

Average Price

$499 USD

Market Intelligence

Retailers Selling

Cross Retailer %

33.3%

Price Spread

39.0%

30-Day Price Trend

+1.1%

30-Day Supply Change

+21.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,530/ct

10th Percentile

$1,106

Median

$1,530

90th Percentile

$2,330

Score Distribution

139 diamonds scored across 4 quality tiers

Excellent

41 (29.5%)

Very Good

31 (22.3%)

Good

40 (28.8%)

Average

27 (19.4%)

Find Your Diamond

Search 57 I IF marquise diamonds and compare prices.

Search Diamonds

Consider Instead

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

J IFJ colour is visually identical to I to the naked eye

Save 8%

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