 Carat is the measure of how much a diamond weighs. Diamond carats is often denoted as “carats” or “ct.”.

### What is a Carat ?

A carat is a type of weight measure. Diamonds, just like other kinds of gemstones, are weighed using the metric carats.

A carat equals two-tenths of a gram or 200 milligrams, (1 carat = 0.2 grams = 200 milligrams).
Each carat is then divided up into 100 total points. (1 carat = 100 points)
Therefore, a 50-point gemstone can be expected to weigh 0.50 carats or 1/2 of a carat.

### The origin of carat weight and its acceptance as an industry standard

The origins of using the carat as a measurement of weight come from the early days of trading when carob seeds were used as counterweights to balance scales for gem traders. These seeds were generally a uniform weight, so their use was something everyone could agree on as a way of measuring weight. Over time, this evolved into the carat weights used today.

### How is carat weight denoted ?

The abbreviation of "CT" is used specifically for carat, which refers to the weight of one diamond or gemstone. Example 1 carat will be denoted as 1 CT.
There are carat abbreviations that are single, and abbreviations that are used for total weight, some of them are explained below.

• CT = Carat Total. Also know as CW(Carat Weight)
• CTW = Carat Total Weight. Also knows as CWT(Carat Weight Total), TW(Total Weight) & TDW(Total Diamond Weight)

### How is the diamond price calculated using carat?

The price of a diamond is calculated by multiplying the diamond carat weight by per carat price. Example if a diamond weighs 0.50 carats and the market price per carat is \$2000/carat. Then the 0.50ct diamond will cost you \$1000.

Total Carat Weight * Price Per Carat = Diamond Price
0.50ct * \$2000 = \$1000

Similary, if a diamond weighs 1.50 carats and the market price per carat is \$4000/carat. Then the 1.50ct diamond will cost you \$6000.

1.50ct * \$4000 = \$6000

### How is the price per carat determined?

The price per carat varies based on the Diamonds characteristics. The base price per carat is determined using a combination of carat weight, clarity, and color. Other characteristics of the diamond such as cut, fluorescence, polish, etc. can add a premium or discount the base per carat price. The per carat price is dynamic and changes weekly varying based on the demand and supply of Diamonds available globally.

### Carat Weight vs Price Per Carat

The price per carat is not a linear measure and multiplies exponentially. This is mostly because larger Diamonds are rarer than small ones. So a larger diamond does not only cost more. Its also costs more per carat.