How much does a 1.00 to 1.49ct J SI1 natural cushion diamond cost?

As of November 2026, 1.00 to 1.49ct J SI1 natural cushion diamonds typically cost €940 EUR to €2,927 EUR, with a median price of €1,616 EUR. There are currently 455 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 64%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI1 Natural Cushion

Quick answer

As of November 2026, there are 455 natural cushion diamonds with J color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €940 EUR to €2,927 EUR, with a median of €1,616 EUR. At least 56 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 64%. Half of all listings fall between €1,101 EUR and €2,049 EUR per carat. The same specification in lab grown form lists at a median of about €906 EUR per carat. Over the last 30 days the median price moved +0.2% and the number of listings moved +7.6%.

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: November 2026

Available

455

Lowest Price

€668 EUR

Highest Price

€6,092 EUR

Average Price

€1,820 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

38.5%

Price Spread

64.2%

30-Day Price Trend

+0.2%

30-Day Supply Change

+7.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,650/ct

10th Percentile

$1,010

Median

$1,650

90th Percentile

$2,916

Score Distribution

1.1K diamonds scored across 4 quality tiers

Excellent

160 (14.5%)

Very Good

215 (19.5%)

Good

286 (26.0%)

Average

440 (40.0%)

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Consider Instead

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

Lab-Grown J SI1Same specifications, lab-grown origin

Save 39%

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