How much does a 1.00 to 1.49ct D I1 natural cushion diamond cost?

As of November 6, 2026, 1.00 to 1.49ct D I1 natural cushion diamonds typically cost $2,644 AUD to $10,869 AUD, with a median price of $6,806 AUD. There are currently 150 diamonds matching this specification available across retailers.

Where can I find the best price on a D I1 cushion diamond?

About 12% of these diamonds are available at multiple retailers, with an average price spread of 60%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D I1 Natural Cushion

Quick answer

As of November 6, 2026, there are 150 natural cushion diamonds with D colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,644 AUD to $10,869 AUD, with a median of $6,806 AUD. Half of all listings fall between $3,692 AUD and $7,158 AUD per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved -0.3%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Cushion natural stones in the index: 2,881 USD per carat, -2.5% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

150

Lowest Price

$1,403 AUD

Highest Price

$12,519 AUD

Average Price

$6,556 AUD

Market Intelligence

Cross Retailer %

12.0%

Price Spread

59.6%

30-Day Price Trend

-0.3%

30-Day Supply Change

-0.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,998/ct

10th Percentile

$1,735

Median

$3,998

90th Percentile

$5,476

Score Distribution

150 diamonds scored across 4 quality tiers

Excellent

11 (7.3%)

Very Good

12 (8.0%)

Good

8 (5.3%)

Average

119 (79.3%)

Find Your Diamond

Search 150 D I1 cushion diamonds and compare prices.

Search Diamonds

Consider Instead

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

E I1

Save 22%

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