How to choose an engagement diamond? Understanding the Carat Card Count in 4C

When you start planning to choose the perfect engagement ring , the "4Cs" is a concept you will definitely come across. These four elements - Carat, Color, Clarity and Cut - directly affect the quality and value of diamonds. In today’s article, we will focus on the first “C” – Carat, to help you better understand the meaning of diamond weight and make wise choices.

What is the "Carat" card number?

"Carat" is a unit used to measure the weight of diamonds , 1 carat equals 0.2 grams. You may also have heard the term “shares,” which is usually used to describe diamonds under 1 carat, for example, 50 shares equals 0.50 carats and 80 shares equals 0.80 carats.

It is important to note that the carat count does not directly reflect the size of the diamond. Because the size of a diamond is also related to its shape and cut. Taking a round diamond as an example, a 1-carat diamond with an "Excellent" cut usually has a diameter of 6.4 mm, but in reality, the diameter of each diamond may vary slightly, ranging from approximately 6.3 mm to 6.5 mm.

How to determine the actual size of a diamond?

If you want to know the actual size of the diamond, in addition to the weight (carat number), you should also check the "Measurements" on the certificate. These data are usually located in the upper left corner of the certificate, showing key information such as the diamond's diameter and depth. This way, you can ensure that the diamond you choose meets your expectations.

Explore more natural diamond options and learn about sizes and values ​​in different carats .

The impact of the number of cards on prices

The relationship between the price of a diamond and its carat count is not linear. As weight increases, prices tend to increase exponentially, especially as you approach some iconic card counts (such as 1 cal, 2 cal). For example, a 1 carat diamond may cost 20%-30% more than a 0.9 carat diamond, even though the size difference is barely noticeable to the naked eye.

Therefore, if you are looking for a more cost-effective option within your budget, you can consider diamonds with a carat count slightly lower than a whole number, such as 0.9 carats or 1.9 carats.

Natural Diamonds vs. Cultured Diamonds: Which is Better?

When buying diamonds, you can choose from traditional natural diamonds or cultured diamonds (also called laboratory diamonds or artificial diamonds ), which have become increasingly popular in recent years. The main difference between the two is the source:

• Natural diamonds: occur naturally in the earth, are rare and have historical significance.
• Cultured diamonds: Made in a laboratory, they have the exact same chemical and physical properties as natural diamonds, but are more environmentally friendly and more affordable.

If you’re looking for an affordable and sustainable option, consider cultured diamonds. Learn more about cultured diamonds .

How to balance the number of cards with other 4C standards?

Of course, carat count is only one factor that affects diamond quality. When choosing an engagement ring or wedding band , you also need to consider cut, color, and clarity:

• Cut: Cut is the key to determining the fire of a diamond. A diamond with an "Excellent" cut can still show attractive brilliance even if it is smaller in carat weight.
• Color: Diamond color is graded from D (colorless) to Z (light yellow). Colorless diamonds are more expensive, but near-colorless G or H color grades are usually more cost-effective.
• Clarity: Diamonds with fewer internal flaws are more valuable, but most slightly flawed diamonds (VS2 or SI1) are not noticeable to the naked eye and are suitable for consumers with limited budgets.

ANTONELLI offers a wide range of natural and cultured diamonds certified by GIA or IGI to help you find the perfect choice.