How much does a 5.00ct+ F SI2 natural cushion diamond cost?

As of October 2026, 5.00ct+ F SI2 natural cushion diamonds typically cost €70,436 EUR to €124,703 EUR, with a median price of €97,487 EUR. There are currently 11 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 cushion diamond?

About 31% of these diamonds are available at multiple retailers, with an average price spread of 31%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI2 Natural Cushion

Quick answer

As of October 2026, there are 11 natural cushion diamonds with F colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run €70,436 EUR to €124,703 EUR, with a median of €97,487 EUR. At least 30 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 31%. Half of all listings fall between €12,296 EUR and €16,610 EUR per carat. The same specification in lab grown form lists at a median of about €241 EUR per carat. Over the last 30 days the median price moved +0.6% and the number of listings moved -2.9%.

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

€62,464 EUR

Highest Price

€341,152 EUR

Average Price

€107,051 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

30.7%

Price Spread

30.6%

30-Day Price Trend

+0.6%

30-Day Supply Change

-2.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$15,666/ct

10th Percentile

$11,410

Median

$15,666

90th Percentile

$21,566

Score Distribution

25 diamonds scored across 4 quality tiers

Excellent

3 (12.0%)

Very Good

3 (12.0%)

Good

10 (40.0%)

Average

9 (36.0%)

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Consider Instead

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

Lab-Grown F SI2Same specifications, lab-grown origin

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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