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

As of November 2026, 1.00 to 1.49ct I FL natural cushion diamonds typically cost £1,933 GBP to £3,686 GBP, with a median price of £2,899 GBP. There are currently 1 diamonds matching this specification available across retailers.

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

About 17% of these diamonds are available at multiple retailers, with an average price spread of 28%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I FL Natural Cushion

Quick answer

As of November 2026, there are 1 natural cushion diamonds with I colour and FL clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,933 GBP to £3,686 GBP, with a median of £2,899 GBP. At least 19 retailers stock this exact specification, and 17% of the stones appear at more than one of them, with an average price spread of 28%. Half of all listings fall between £3,989 GBP and £5,181 GBP per carat. Over the last 30 days the median price moved +1.6% and the number of listings moved +2.1%.

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

1.32ct Cushion I FL, GIA, grade A, from £3,488 GBP

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

Lowest Price

£1,862 GBP

Highest Price

£4,851 GBP

Average Price

£2,821 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

16.7%

Price Spread

27.6%

30-Day Price Trend

+1.6%

30-Day Supply Change

+2.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,796/ct

10th Percentile

$2,730

Median

$5,796

90th Percentile

$7,560

Score Distribution

5 diamonds scored across 3 quality tiers

Excellent

1 (20.0%)

Very Good

1 (20.0%)

Good

3 (60.0%)

Find Your Diamond

Search 1 I FL cushion diamonds and compare prices.

Search Diamonds

Consider Instead

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

J FLJ colour is visually identical to I to the naked eye

Save 71%

I IFIF inclusions are not visible without magnification

Save 54%

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