How much does a 0.75 to 0.99ct H SI2 natural cushion diamond cost?

As of October 2026, 0.75 to 0.99ct H SI2 natural cushion diamonds typically cost £538 GBP to £2,110 GBP, with a median price of £997 GBP. There are currently 127 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 cushion diamond?

About 28% of these diamonds are available at multiple retailers, with an average price spread of 79%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct H SI2 Natural Cushion

Quick answer

As of October 2026, there are 127 natural cushion diamonds with H colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £538 GBP to £2,110 GBP, with a median of £997 GBP. At least 50 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 79%. Half of all listings fall between £850 GBP and £1,819 GBP per carat. Over the last 30 days the median price moved +1.4% and the number of listings moved +2.9%.

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

127

Lowest Price

£329 GBP

Highest Price

£4,764 GBP

Average Price

£1,177 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

28.2%

Price Spread

79.5%

30-Day Price Trend

+1.4%

30-Day Supply Change

+2.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,619/ct

10th Percentile

$880

Median

$1,619

90th Percentile

$3,141

Score Distribution

333 diamonds scored across 4 quality tiers

Excellent

39 (11.7%)

Very Good

58 (17.4%)

Good

112 (33.6%)

Average

124 (37.2%)

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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