How much does a 1.00 to 1.49ct E SI2 natural cushion diamond cost?

As of September 2026, 1.00 to 1.49ct E SI2 natural cushion diamonds typically cost $2,236 AUD to $7,501 AUD, with a median price of $3,814 AUD. There are currently 677 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct E SI2 Natural Cushion

Quick answer

As of September 2026, there are 677 natural cushion diamonds with E colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,236 AUD to $7,501 AUD, with a median of $3,814 AUD. At least 47 retailers stock this exact specification. Half of all listings fall between $2,878 AUD and $5,077 AUD per carat. The same specification in lab grown form lists at a median of about $809 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

677

Lowest Price

$1,276 AUD

Highest Price

$15,488 AUD

Average Price

$4,426 AUD

Market Intelligence

Retailers Selling

Price Spread

58.1%

Price Range

Price per carat distribution across retailers

$2,461/ct

10th Percentile

$1,527

Median

$2,461

90th Percentile

$4,298

Score Distribution

677 diamonds scored across 4 quality tiers

Excellent

105 (15.5%)

Very Good

167 (24.7%)

Good

212 (31.3%)

Average

193 (28.5%)

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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 9%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 73%

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