Natural Diamond Market
As of September 2026, there are 12,421,763 natural diamond listings available across retailers worldwide. The average price per carat is $10,203 AUD. Prices have decreased by 8.5% over the past 30 days.
Last updated: September 2026
Available by shape
Listing counts across the top 10 most-stocked shapes for this origin.
Round
6.6M
Oval
1.3M
Pear
1.1M
Emerald
958K
Cushion
596K
Princess
455K
Marquise
420K
Heart
381K
Radiant
335K
Asscher
206K
Price by carat bucket
Average price per carat rises sharply at the 1.00, 2.00 and 3.00ct marks.
0.20-0.29ct
$4.4K
0.30-0.49ct
$2.0K
0.50-0.74ct
$2.0K
0.75-0.99ct
$2.3K
1.00-1.24ct
$3.1K
1.25-1.49ct
$4.0K
1.50-1.99ct
$4.9K
2.00-2.49ct
$6.7K
2.50-2.99ct
$8.9K
3.00-3.99ct
$11.2K
4.00-4.99ct
$14.9K
5.00-9.99ct
$19.0K
10.00+ct
$32.2K
unknownct
$8.3K
Available Shapes
Round
6,584,408 listings
Avg: $11,572 AUD/ct
Oval
1,313,981 listings
Avg: $11,298 AUD/ct
Pear
1,145,298 listings
Avg: $12,271 AUD/ct
Emerald
957,920 listings
Avg: $10,106 AUD/ct
Cushion
595,801 listings
Avg: $10,832 AUD/ct
Princess
455,324 listings
Avg: $7,067 AUD/ct
Marquise
419,992 listings
Avg: $11,577 AUD/ct
Heart
381,254 listings
Avg: $9,814 AUD/ct
Radiant
335,108 listings
Avg: $10,130 AUD/ct
Asscher
206,187 listings
Avg: $8,786 AUD/ct
Other
19,827 listings
Avg: $8,707 AUD/ct
Baguette
3,584 listings
Avg: $5,637 AUD/ct
Trillion
2,958 listings
Avg: $5,676 AUD/ct
Sq_radiant
121 listings
Avg: $3,315 AUD/ct
By Carat Weight
| Carat Range | Listings | Avg Price/ct |
|---|---|---|
| 0.20-0.29 | 321,976 | $6,109 AUD |
| 0.30-0.49 | 2,999,613 | $2,777 AUD |
| 0.50-0.74 | 3,508,795 | $2,827 AUD |
| 0.75-0.99 | 1,103,771 | $3,201 AUD |
| 1.00-1.24 | 2,069,889 | $4,387 AUD |
| 1.25-1.49 | 256,621 | $5,558 AUD |
| 1.50-1.99 | 1,073,686 | $6,849 AUD |
| 2.00-2.49 | 542,307 | $9,450 AUD |
| 2.50-2.99 | 152,660 | $12,484 AUD |
| 3.00-3.99 | 194,440 | $15,786 AUD |
| 4.00-4.99 | 49,380 | $20,919 AUD |
| 5.00-9.99 | 45,911 | $26,690 AUD |
| 10.00+ | 4,036 | $45,145 AUD |
| unknown | 98,678 | $11,578 AUD |