How much does a 1 carat diamond cost? A 1 carat diamond ring?
Are you looking for an engagement ring? Are you wondering how much a 1 carat diamond costs ? A ring with such a stone? What size does it correspond to? Miller, the specialist in second-hand and antique luxury jewelry in Paris, answers all your questions on the subject!
Definition of carat
Carat is a unit of measurement used in the gemstone industry as a unit of weight . In short, one carat is equal to 0.2 grams or 200 milligrams. A one-carat diamond therefore weighs one-fifth of a gram.
A first international carat, weighing 205 mg, was proposed in the 1870s. This standard as we know it was created in 1907 at a conference of the International Bureau of Weights and Measures , located in Paris (Saint-Cloud). It was then quickly adopted internationally. The concept is much older, but the weight of the carat varied from one country to another before standardization.
How much does a 1 carat diamond cost?
The price of a 1 carat diamond varies considerably depending on the stone . Color, size, quality… As always when evaluating the value of such a gem, the 4Cs of the diamond will determine its price.
Generally speaking, you can expect to pay anywhere from $1,500 to $15,000 for a high-quality natural 1 carat diamond. The average is around $5,000 for one carat . For a synthetic diamond, it starts around $500 and goes up to $12,000.
And the price of a second-hand 1 carat diamond?
In the diamond sector, there is no such thing as second hand! This stone is the hardest material known on earth. It does not get damaged, does not lose its luster… so there is no second hand diamond category.
On the other hand, we obviously make a distinction between new diamond jewelry and second-hand diamond jewelry! The stone cannot be scratched. On the other hand, the ravages of time can affect a gold ring, a vintage piece of jewelry or platinum earrings with diamond. In this case, you will pay less for your second-hand 1 carat diamond jewelry .
What are the criteria that determine the price of a 1 carat diamond?
In the diamond world, the quality of stones is determined by the so-called 4C diamond system. This corresponds to:
- The size (cut)
- The color (color)
- Purity (clarity)
- Weight (carat)
This is why there are such disparities in the prices of 1 carat diamonds.
1 Carat Diamond: Is It Considered a Big Stone? What Is the Actual Size?
A one-carat diamond is already a respectable size in Europe . For example, on our continent a standard engagement ring features a 0.5-carat diamond. Of course, this figure varies depending on one's socio-economic status.
A 1 carat round cut diamond results in a stone measuring 6.4 mm in diameter . It is interesting to note, however, that the increase in size is not proportional to the increase in weight. For example:
- A 1.5 carat round diamond has a diameter of 7.3 mm
- 1 round diamond of 2 carats has a diameter of 8 mm
- A 3 carat round diamond has a diameter of 9.2 mm
This is interesting. For example, for a 3 carat stone viewed from above, the size of the diamond increases by less than 50% for a weight 3 times greater than a 1 carat diamond !
In addition, it should not be forgotten that the carat is a unit of weight. The size (shape) of the diamond will have a significant impact on its volume. Real or perceived, moreover. For example, a 1 carat princess-cut diamond will be more compact than a pear- or oval-cut diamond of equal weight.
It should also be remembered that in the case of a diamond ring , for example, the size of the wearer's hands will have an impact. The smaller the hands, the more imposing the 1 carat diamond will look!
- Used Gerard diamond ring
- Used Alexandre Reza Rings
The higher the weight, the higher the price per carat.
For a one carat diamond, the price peaks at around €15,000. However, for a stone of a similar quality with a higher mass, this price per carat will increase significantly. A stone of a larger size will therefore be more expensive on two counts (intrinsic mass + increase in the price per carat ).
The most valuable diamonds cost millions per carat. For example, the Oppenheimer Blue sold for $3.93 million per carat. The Williamson Pink Star diamond sold for $4.475 million per carat. These 2 exceptional gems are among the top 10 most expensive diamonds in the world.
Price per carat of diamonds (natural)
| Weight | Diamond Price (Average) | Price of a used ring (APD) |
| 1/2 carat | Around €1,500 | Around €3,500 |
| 1 carat | Around €5,000 | Around €7,000 |
| 1.5 carat | Around €9,000 | Around €12,000 |
FAQ 1 carat diamond price
The price ranges are similar to those for diamonds in general, so say from €1,500 to €15,000.
1 carat synthetic diamonds tend to be less expensive for similar quality. You can find them starting at $500.
At Miller you can find such luxury rings for around €6,000-7,000.
