One of the 4 C’s – Carat Weight of Diamonds

diamond carat sizeDiamonds are one of the most commonly used gemstones in the jewelry industry, with the most popular type of jewelry fitted with diamonds being engagement rings and wedding rings, of course. Many other types of jewelry also use diamonds as a center stone, but people often associate these precious gemstones with engagements and weddings. When a woman gets an engagement ring from her soulmate, she would start to show it off to her circle of girlfriends, colleagues, family and other friends. For this reason, it is often considered important for the diamond used as a center stone to be relatively large – the larger the diamond, the more there is to show off. Unfortunately, simply opting for the diamond with the largest surface you can get does not necessarily mean you are buying the best possible ring for your lover. In fact, when the diameter of the diamond’s surface does not compare well with its overall size, it could mean that the diamond is too shallow, which means it would not reflect light well and its sparkle will be compromised.

Diamond Weight, Diameter And Cut

The weight of a diamond is measured in carats. Since 1907, this measurement system has been adopted throughout the entire world. Each carat of a diamond is equal to exactly 200 milligrams of weight. A higher carat weight generally also means a larger diamond, but people often tend to focus too much on the carat weight of a diamond when they want to determine the size they would like to buy. While carat weight is an important aspect to consider, there are other factors that a person should also take into account when they buy a diamond based on its size.

When a diamond is purchased based on its size, the weight should be a concerning factor, but the crown surface and diameter of the diamond should also be two aspects that the buyer looks at when buying a diamond. Many jewelers agree, a one carat diamond should have a diameter of around 6.50 and a crown surface of approximately 33.2 mm2. If these particular values of a one carat diamond is different than the recommended jewelry settings, the diamond may be too shallow or too deep. In such cases, light would escape the diamond at the wrong point and not reflect back upwards. This causes the sparkle, brilliance and fire of a diamond to be compromised in a negative manner.

For this reason, a person that is buying a diamond jewelery based on its size should not only consider what the carat weight of the diamond, but also look at the details listed underneath the “cut grade” of the diamond. This particular section will offer in-depth details of the table %, depth % and other vital figures that will help the buyer determine if the diamond might be too deep or too shallow, or be just perfect to ensure the brilliance is something to be proud of – and not something that should rather be hidden away.


rough diamondThe carat weight of a diamond refers to how much it weighs; thus it is only natural for a person to think that the carat weight is the only important aspect to look at when determining how large a diamond would be. Another thing that people tend to look at is the surface diameter of a diamond, but they often fail to realize that other aspects also need to be taken into account that relates to the cut quality of the diamond. When a diamond is too deep or too shallow, it would not have a beautiful sparkle and it would compromise the quality of the particular diamond.

Make sure to educate yourself on the remaining 4 C’s of diamonds. I outline them here clearly so learning becomes less of a hassle!

Mary Turner


With experience dating back to when brick and mortar was the ONLY source for shopping for diamonds, I have countless men find the perfect diamond for that special occasion. As your Personal Diamond Consultant, I'm here to make sure you end up with the perfect stone.