3 Carat Diamond Prices
The average price for a 3 carat diamond in Australia in September 2024 is $64,526.
However, this can range from $37,287 for a diamond with poor colour, clarity and cut quality to $98,954 for a diamond with top specifications.
Diamond carat prices are continually changing and you can see in the graph below that this has varied by 16.66% over the last year.
3 Carat Diamond Prices in Australia
| Month | Price ($) |
|---|---|
| Sep '23 | 64,526 |
| Oct '23 | 64,480 |
| Nov '23 | 61,965 |
| Dec '23 | 59,241 |
| Jan '24 | 61,239 |
| Feb '24 | 63,420 |
| Mar '24 | 64,296 |
| Apr '24 | 64,713 |
| May '24 | 69,420 |
| Jun '24 | 66,990 |
| Jul '24 | 65,056 |
| Aug '24 | 62,550 |
| Sep '24 | 61,093 |
How shape affects 3 carat diamond price
One of the biggest factors that affects the price of a 3 carat diamond is the shape of the diamond.
Different shapes not only offer distinct styles but also vary in cost due to factors like cutting complexity, demand, and how much of the original rough diamond is retained during the cutting process.
The table below show the ranking of 3 carat diamonds by shape:
Here is the revised summary with the requested changes and in Australian English:
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The Marquise cut is the most expensive 3-carat diamond shape, priced at $68,862 AUD. This high cost can be attributed to its unique shape, which requires precision cutting to maintain the diamond’s symmetry and brilliance. Additionally, there are not very many Marquise diamonds available at this carat weight, which means that the price can easily be skewed by some expensive stones. The Marquise diamond also tends to appear larger than other shapes of the same carat weight, adding to its allure and market value.
The Pear-shaped diamond follows closely behind at $64,920 AUD. Pear-shaped diamonds are valued for their elongated form, which creates an illusion of a larger size and adds to their popularity in high-end jewellery.
Round brilliant diamonds, priced at $63,941 AUD, are usually among the most expensive shapes when considering higher colour and cut grades. However, this price reflects an average that includes lower cut grades and colours, which can bring down the overall cost. The Round brilliant remains popular due to its exceptional brilliance and light performance, making it a favoured choice for engagement rings and premium jewellery.
Emerald and Oval-shaped diamonds, priced at $61,727 AUD and $60,183 AUD respectively, are also on the higher end of the price spectrum. These shapes are appreciated for their distinctive appearances—the Emerald cut for its step-cut facets and clarity, and the Oval cut for its elongated form that maximises the perception of size.
Radiant diamonds, at $58,466 AUD, offer a balance between brilliance and unique facet patterns, making them a versatile option for various types of jewellery.
Asscher and Cushion cuts are priced at $55,850 AUD and $55,263 AUD respectively. The Asscher cut is known for its vintage appeal and deep clarity, while the Cushion cut’s rounded corners and larger facets give it a softer look and excellent brilliance.
Princess cuts are the most affordable 3-carat diamond shape in this list, priced at $48,441 AUD. The Princess cut maximises the use of the rough diamond, minimising waste and reducing costs. It is a popular choice for those seeking a balance between price and brilliance, although it tends to appear smaller than other shapes of the same carat weight.
Overall, the price variations among different 3-carat diamond shapes in Australia reflect a combination of factors, including cutting complexity, material loss, and market demand. This range of options provides buyers with diverse choices to suit their preferences and budgets.
