How much does a 5.00ct+ E SI2 lab grown cushion diamond cost?

As of October 2026, 5.00ct+ E SI2 lab grown cushion diamonds typically cost $1,331 SGD to $2,771 SGD, with a median price of $1,913 SGD. There are currently 4 diamonds matching this specification available across retailers.

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

About 100% 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.

5.00ct+ E SI2 Lab Grown Cushion

Quick answer

As of October 2026, there are 4 lab grown cushion diamonds with E colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,331 SGD to $2,771 SGD, with a median of $1,913 SGD. At least 10 retailers stock this exact specification, and 100% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $483 SGD and $1,021 SGD per carat. The same specification in natural form lists at a median of about $21,894 SGD per carat.

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 lab grown stones in the index: 516 USD per carat, +6.9% 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

$1,154 SGD

Highest Price

$15,671 SGD

Average Price

$2,028 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

100.0%

Price Spread

80.7%

Price Range

Price per carat distribution across retailers

$521/ct

10th Percentile

$311

Median

$521

90th Percentile

$1,520

Score Distribution

8 diamonds scored across 3 quality tiers

Excellent

4 (50.0%)

Very Good

3 (37.5%)

Average

1 (12.5%)

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F SI2F colour is visually identical to E 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