How much does a 1.50 to 1.99ct E SI2 natural cushion diamond cost?

As of October 2026, 1.50 to 1.99ct E SI2 natural cushion diamonds typically cost $4,718 SGD to $13,642 SGD, with a median price of $8,062 SGD. There are currently 156 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI2 Natural Cushion

Quick answer

As of October 2026, there are 156 natural cushion diamonds with E colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $4,718 SGD to $13,642 SGD, with a median of $8,062 SGD. At least 53 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $3,928 SGD and $6,639 SGD per carat. The same specification in lab grown form lists at a median of about $599 SGD per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved +4.8%.

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

156

Lowest Price

$3,227 SGD

Highest Price

$23,565 SGD

Average Price

$8,811 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

30.4%

Price Spread

53.9%

30-Day Price Trend

-2.5%

30-Day Supply Change

+4.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,926/ct

10th Percentile

$2,582

Median

$3,926

90th Percentile

$6,454

Score Distribution

479 diamonds scored across 4 quality tiers

Excellent

95 (19.8%)

Very Good

101 (21.1%)

Good

112 (23.4%)

Average

171 (35.7%)

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Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

Save 11%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 88%

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