The differences between Ct (Carat) and Kt (Karat) ?

Carat vs Karat

Because “carat” and “Karat” have the same pronunciation and similar spelling, many jewelry buyers are confused about what the differences between they are. In a few words, “carat” is the measurement of the weight of precious stone and pearl, it’s especially used for weighing diamond. Whereas “karat” is the measurement of the purity of precious metal expressed in fraction of 24th’s, especially gold. For example 10 karat means 10/24 =41.7%.

Carat

One carat is one-fifth of a gram or 200mg = 0.0070548 oz. It’s a measurement based on the commonly used metric system, which is denoted as “Ct.” for example, a stackable birthstone ring having a 1 Ct. Diamond in sterling silver is popular. But the size is familiar to most people and intuitively clear. The following details the approximate diameters of a round brilliant cut diamond – note other stones have different density and the sizes will vary from this table.

Most engagement rings are in the range 4mm—7mm, while anything over 9mm is really very large which are rarely seen.

Karat

Usually, karat is the percentage of Gold in metal. The purity of gold can be scaled from 1-24. 24 karat is the purest form of gold. As you know, gold is one of the softer metals and needs to be added with alloys to harden it to make jewelry. In the US, “karat” is written as “K.” in other countries, “karat” is also written as “C.” The following table details the percentage of pure gold in each of the commonly available “Karat” that jewelry is usually available in:

The presence of these alloys can be identified by the color of the gold jewelry by an experienced eye. Most commonly, 18 karat jewelry is available.

Summary:

1. Carat is the measurement of the weight of precious stones, especially diamonds;

Karat is the measurement of purity of a metal, especially gold.

2. A carat is 0.2g or 200mg and is divided into 100 points;

Karat is measured on a scale of 1-24.

3. Carat is most commonly denoted as “”:

Karat is most commonly denoted as “K”.

So the diamond ring you buy will have a weight of the stone measured in Carats & it will also have a purity of the gold in the ring measured in Karats -it will always have both !!!

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