Diamond carat explained
Diamond carat refers to the weight of a diamond. It is often used as an indication of the size of a diamond, but it’s not the exact same thing. In a similar way, you know a 5kg golf ball is bigger (too big) than a 1kg golf ball, but that doesn’t mean you know how big they are.
Carat is a word that comes from an interesting and long history. It is said the word comes from the time when tiny carob seeds were used by diamond traders to measure the weight of a diamond. Carob seeds were known for their uniform size and weight and made for the perfect tool to weigh diamonds. Until the system was formalized with better weighing techniques, carob seeds were used to weigh both diamonds and gemstones. Today, one carat equals to 0.2 grams.
The carat weight system
One carat equals to 0.2 grams. The single Carat unit is divided into 100 points, which is used to determine the weight of diamonds below 1 carat, or to give a more detailed description of the weight of a diamond to the 2nd decimal place. So, a diamond weighing half a carat is 50 points, and a diamond weighing 2 carats and a quarter is a 2.25 carat diamond.
In the professional diamond industry, the carat weight of a diamond is also used for diamond prices. Industry professionals say prices in a “price per carat” format. To reach the final price of the diamond, the price per carat unit must be multiplied by the total carat weight.
Based on prices at time of writing, here’s an example:
- Loose diamond: 3 carat VVS1 Clarity J Color
- Price per Carat: $14,190
- Total price: $42,570