How much does a 1.00 to 1.49ct I I1 natural cushion diamond cost?

As of September 2026, 1.00 to 1.49ct I I1 natural cushion diamonds typically cost €1,158 EUR to €2,955 EUR, with a median price of €1,679 EUR. There are currently 168 diamonds matching this specification available across retailers.

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

About 18% 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.

1.00 to 1.49ct I I1 Natural Cushion

Quick answer

As of September 2026, there are 168 natural cushion diamonds with I colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,158 EUR to €2,955 EUR, with a median of €1,679 EUR. At least 20 retailers stock this exact specification, and 18% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between €1,203 EUR and €1,942 EUR per carat. The same specification in lab grown form lists at a median of about €2,162 EUR per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +7.0%.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

168

Lowest Price

€922 EUR

Highest Price

€6,847 EUR

Average Price

€1,982 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

18.4%

Price Spread

51.5%

30-Day Price Trend

-1.8%

30-Day Supply Change

+7.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,647/ct

10th Percentile

$1,225

Median

$1,647

90th Percentile

$2,957

Score Distribution

168 diamonds scored across 4 quality tiers

Excellent

2 (1.2%)

Very Good

12 (7.1%)

Good

16 (9.5%)

Average

138 (82.1%)

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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