How much does a 0.50 to 0.74ct I SI1 natural cushion diamond cost?

As of October 2026, 0.50 to 0.74ct I SI1 natural cushion diamonds typically cost $567 CAD to $1,841 CAD, with a median price of $832 CAD. There are currently 103 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI1 cushion diamond?

About 24% of these diamonds are available at multiple retailers, with an average price spread of 68%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I SI1 Natural Cushion

Quick answer

As of October 2026, there are 103 natural cushion diamonds with I color and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $567 CAD to $1,841 CAD, with a median of $832 CAD. At least 49 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 68%. Half of all listings fall between $1,200 CAD and $2,266 CAD per carat. Over the last 30 days the median price moved +3.4% and the number of listings moved -2.1%.

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

103

Lowest Price

$397 CAD

Highest Price

$3,966 CAD

Average Price

$1,041 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

24.4%

Price Spread

67.5%

30-Day Price Trend

+3.4%

30-Day Supply Change

-2.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,127/ct

10th Percentile

$716

Median

$1,127

90th Percentile

$2,150

Score Distribution

289 diamonds scored across 4 quality tiers

Excellent

43 (14.9%)

Very Good

54 (18.7%)

Good

104 (36.0%)

Average

88 (30.4%)

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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