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

As of October 2026, 1.00 to 1.49ct I IF natural cushion diamonds typically cost £1,171 GBP to £3,581 GBP, with a median price of £1,745 GBP. There are currently 45 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I IF Natural Cushion

Quick answer

As of October 2026, there are 45 natural cushion diamonds with I colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,171 GBP to £3,581 GBP, with a median of £1,745 GBP. At least 53 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between £1,547 GBP and £2,674 GBP per carat. Over the last 30 days the median price moved +0.5% and the number of listings moved +3.4%.

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

Lowest Price

£932 GBP

Highest Price

£6,261 GBP

Average Price

£2,120 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

31.5%

Price Spread

56.8%

30-Day Price Trend

+0.5%

30-Day Supply Change

+3.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,643/ct

10th Percentile

$1,713

Median

$2,643

90th Percentile

$4,571

Score Distribution

94 diamonds scored across 5 quality tiers

Exceptional

1 (1.1%)

Excellent

20 (21.3%)

Very Good

30 (31.9%)

Good

26 (27.7%)

Average

17 (18.1%)

Find Your Diamond

Search 45 I IF 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 IFJ colour is visually identical to I to the naked eye

Save 29%

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