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

As of November 2026, 1.00 to 1.49ct G SI2 natural cushion diamonds typically cost $1,780 AUD to $6,233 AUD, with a median price of $3,550 AUD. There are currently 374 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 67%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI2 Natural Cushion

Quick answer

As of November 2026, there are 374 natural cushion diamonds with G colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,780 AUD to $6,233 AUD, with a median of $3,550 AUD. At least 55 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 67%. Half of all listings fall between $2,227 AUD and $4,316 AUD per carat. The same specification in lab grown form lists at a median of about $808 AUD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +6.6%.

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: November 2026

Available

374

Lowest Price

$937 AUD

Highest Price

$13,007 AUD

Average Price

$3,805 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

35.9%

Price Spread

66.7%

30-Day Price Trend

-1.0%

30-Day Supply Change

+6.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,201/ct

10th Percentile

$1,268

Median

$2,201

90th Percentile

$3,937

Score Distribution

855 diamonds scored across 4 quality tiers

Excellent

148 (17.3%)

Very Good

158 (18.5%)

Good

222 (26.0%)

Average

327 (38.2%)

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Consider Instead

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

G I1I1 inclusions are not visible without magnification

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Lab-Grown G SI2Same specifications, lab-grown origin

Save 68%

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