How much does a 2.00 to 2.99ct D SI1 natural cushion diamond cost?

As of September 2026, 2.00 to 2.99ct D SI1 natural cushion diamonds typically cost $15,730 AUD to $42,495 AUD, with a median price of $26,223 AUD. There are currently 533 diamonds matching this specification available across retailers.

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

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2.00 to 2.99ct D SI1 Natural Cushion

Quick answer

As of September 2026, there are 533 natural cushion diamonds with D colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $15,730 AUD to $42,495 AUD, with a median of $26,223 AUD. At least 48 retailers stock this exact specification. Half of all listings fall between $9,364 AUD and $14,251 AUD per carat. The same specification in lab grown form lists at a median of about $504 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

533

Lowest Price

$4,376 AUD

Highest Price

$103,607 AUD

Average Price

$28,056 AUD

Market Intelligence

Retailers Selling

Price Spread

41.5%

Price Range

Price per carat distribution across retailers

$8,400/ct

10th Percentile

$5,431

Median

$8,400

90th Percentile

$11,761

Score Distribution

532 diamonds scored across 4 quality tiers

Excellent

55 (10.3%)

Very Good

133 (25.0%)

Good

176 (33.1%)

Average

168 (31.6%)

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Lab-Grown D 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