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

As of October 2026, 3.00 to 4.99ct I IF natural cushion diamonds typically cost $26,612 USD to $43,897 USD, with a median price of $42,774 USD. There are currently 3 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 26%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I IF Natural Cushion

Quick answer

As of October 2026, there are 3 natural cushion diamonds with I color and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $26,612 USD to $43,897 USD, with a median of $42,774 USD. At least 27 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 26%. Half of all listings fall between $14,700 USD and $18,948 USD per carat. Over the last 30 days the median price moved -5.8% and the number of listings moved +57.7%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

$25,610 USD

Highest Price

$69,046 USD

Average Price

$36,889 USD

Market Intelligence

Retailers Selling

Cross Retailer %

34.8%

Price Spread

25.8%

30-Day Price Trend

-5.8%

30-Day Supply Change

+57.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$16,439/ct

10th Percentile

$10,473

Median

$16,439

90th Percentile

$21,590

Score Distribution

7 diamonds scored across 3 quality tiers

Excellent

3 (42.9%)

Very Good

2 (28.6%)

Average

2 (28.6%)

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

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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