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

As of October 2026, 0.75 to 0.99ct E SI1 natural cushion diamonds typically cost $1,166 SGD to $4,382 SGD, with a median price of $2,282 SGD. There are currently 149 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI1 Natural Cushion

Quick answer

As of October 2026, there are 149 natural cushion diamonds with E colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,166 SGD to $4,382 SGD, with a median of $2,282 SGD. At least 56 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $1,766 SGD and $3,975 SGD per carat. The same specification in lab grown form lists at a median of about $690 SGD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +3.9%.

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

149

Lowest Price

$837 SGD

Highest Price

$9,151 SGD

Average Price

$2,550 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

30.4%

Price Spread

80.8%

30-Day Price Trend

-1.3%

30-Day Supply Change

+3.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,133/ct

10th Percentile

$1,115

Median

$2,133

90th Percentile

$4,038

Score Distribution

442 diamonds scored across 4 quality tiers

Excellent

61 (13.8%)

Very Good

78 (17.6%)

Good

143 (32.4%)

Average

160 (36.2%)

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Consider Instead

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

Lab-Grown E SI1Same specifications, lab-grown origin

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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