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

As of October 2026, 1.00 to 1.49ct F SI1 natural cushion diamonds typically cost $1,600 USD to $4,989 USD, with a median price of $2,885 USD. There are currently 526 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 60%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI1 Natural Cushion

Quick answer

As of October 2026, there are 526 natural cushion diamonds with F color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,600 USD to $4,989 USD, with a median of $2,885 USD. At least 63 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 60%. Half of all listings fall between $1,891 USD and $3,434 USD per carat. The same specification in lab grown form lists at a median of about $473 USD per carat. Over the last 30 days the median price moved -0.7% and the number of listings moved +6.6%.

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: October 2026

Available

526

Lowest Price

$1,139 USD

Highest Price

$10,394 USD

Average Price

$3,151 USD

Market Intelligence

Retailers Selling

Cross Retailer %

33.7%

Price Spread

59.8%

30-Day Price Trend

-0.7%

30-Day Supply Change

+6.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,582/ct

10th Percentile

$1,569

Median

$2,582

90th Percentile

$4,467

Score Distribution

1.3K diamonds scored across 4 quality tiers

Excellent

209 (16.6%)

Very Good

321 (25.6%)

Good

281 (22.4%)

Average

445 (35.4%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 15%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 82%

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