Natural Diamond Market
As of April 2026, there are 7,284,717 natural diamond listings available across retailers worldwide. The average price per carat is ￥1,027,232 JPY. Prices have decreased by 9.5% over the past 30 days.
Last updated: April 2026
Available by shape
Listing counts across the top 10 most-stocked shapes for this origin.
Round
3.3M
Oval
897K
Pear
770K
Emerald
715K
Heart
369K
Cushion
351K
Princess
292K
Marquise
201K
Radiant
186K
Asscher
140K
Price by carat bucket
Average price per carat rises sharply at the 1.00, 2.00 and 3.00ct marks.
0.20-0.29ct
$3.7K
0.30-0.49ct
$1.9K
0.50-0.74ct
$2.1K
0.75-0.99ct
$2.3K
1.00-1.24ct
$3.1K
1.25-1.49ct
$3.8K
1.50-1.99ct
$4.6K
2.00-2.49ct
$6.6K
2.50-2.99ct
$8.5K
3.00-3.99ct
$11.1K
4.00-4.99ct
$14.2K
5.00-9.99ct
$18.5K
10.00+ct
$31.0K
unknownct
$8.6K
Available Shapes
Round
3,342,166 listings
Avg: ￥1,221,481 JPY/ct
Oval
897,102 listings
Avg: ￥1,103,623 JPY/ct
Pear
769,507 listings
Avg: ￥1,201,928 JPY/ct
Emerald
715,154 listings
Avg: ￥1,067,175 JPY/ct
Heart
369,153 listings
Avg: ￥978,293 JPY/ct
Cushion
350,960 listings
Avg: ￥1,071,288 JPY/ct
Princess
292,253 listings
Avg: ￥642,929 JPY/ct
Marquise
201,351 listings
Avg: ￥1,107,016 JPY/ct
Radiant
185,996 listings
Avg: ￥1,094,785 JPY/ct
Asscher
140,129 listings
Avg: ￥944,280 JPY/ct
Other
14,618 listings
Avg: ￥570,421 JPY/ct
Baguette
4,668 listings
Avg: ￥530,556 JPY/ct
Trillion
1,660 listings
Avg: ￥657,541 JPY/ct
By Carat Weight
| Carat Range | Listings | Avg Price/ct |
|---|---|---|
| 0.20-0.29 | 187,968 | ￥548,060 JPY |
| 0.30-0.49 | 1,518,891 | ￥289,077 JPY |
| 0.50-0.74 | 2,082,218 | ￥309,681 JPY |
| 0.75-0.99 | 677,200 | ￥341,325 JPY |
| 1.00-1.24 | 1,283,923 | ￥469,815 JPY |
| 1.25-1.49 | 146,994 | ￥565,019 JPY |
| 1.50-1.99 | 644,098 | ￥689,090 JPY |
| 2.00-2.49 | 338,698 | ￥986,368 JPY |
| 2.50-2.99 | 102,525 | ￥1,269,004 JPY |
| 3.00-3.99 | 142,607 | ￥1,659,693 JPY |
| 4.00-4.99 | 39,808 | ￥2,126,751 JPY |
| 5.00-9.99 | 45,884 | ￥2,767,139 JPY |
| 10.00+ | 3,226 | ￥4,628,780 JPY |
| unknown | 70,677 | ￥1,284,617 JPY |