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

As of October 2026, 0.50 to 0.74ct I IF natural cushion diamonds typically cost £364 GBP to £883 GBP, with a median price of £551 GBP. There are currently 54 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I IF Natural Cushion

Quick answer

As of October 2026, there are 54 natural cushion diamonds with I colour and IF clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £364 GBP to £883 GBP, with a median of £551 GBP. At least 50 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between £843 GBP and £1,391 GBP per carat. Over the last 30 days the median price moved +3.9% and the number of listings moved -3.6%.

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

Lowest Price

£272 GBP

Highest Price

£2,075 GBP

Average Price

£625 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

28.9%

Price Spread

50.9%

30-Day Price Trend

+3.9%

30-Day Supply Change

-3.6%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,444/ct

10th Percentile

$928

Median

$1,444

90th Percentile

$2,538

Score Distribution

154 diamonds scored across 4 quality tiers

Excellent

36 (23.4%)

Very Good

28 (18.2%)

Good

57 (37.0%)

Average

33 (21.4%)

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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

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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