How much does a 0.75 to 0.99ct F SI1 natural cushion diamond cost?

As of October 2026, 0.75 to 0.99ct F SI1 natural cushion diamonds typically cost $1,091 SGD to $4,109 SGD, with a median price of $2,178 SGD. There are currently 167 diamonds matching this specification available across retailers.

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

About 30% 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 F SI1 Natural Cushion

Quick answer

As of October 2026, there are 167 natural cushion diamonds with F colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,091 SGD to $4,109 SGD, with a median of $2,178 SGD. At least 59 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 79%. Half of all listings fall between $1,795 SGD and $4,099 SGD per carat. The same specification in lab grown form lists at a median of about $938 SGD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +3.5%.

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

167

Lowest Price

$652 SGD

Highest Price

$9,163 SGD

Average Price

$2,456 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

30.3%

Price Spread

79.4%

30-Day Price Trend

-1.0%

30-Day Supply Change

+3.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,263/ct

10th Percentile

$1,033

Median

$2,263

90th Percentile

$4,138

Score Distribution

457 diamonds scored across 4 quality tiers

Excellent

57 (12.5%)

Very Good

71 (15.5%)

Good

179 (39.2%)

Average

150 (32.8%)

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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 22%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 68%

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