The most important factor that determines the value of the stone is the Diamond Carat. But what is the carat and how can they be measured?

This article acts as a diamond buying guide for the newcomers. It will give you a glimpse of the diamond world as what exactly is the carat and how it is calculated. Read below, to know more about it.

# What is Carat?

Carat is a weight unit. The abbreviation of a carat is `ct’. It is used to convey the diamond’s weight and other related gemstones.

1 carat = 0.2 grams or 200 milligrams

One of the most prime points that must be kept in mind is the weight of the carat is not similar to volume or size of it. Each gemstone has its own densities. This is the reason, a diamond which is one carat is not necessarily needed to be big like the other gemstone of a similar carat weight.

## How to calculate a Diamond’s weight?

The diamond is calculated by weighing the stone and is then recorded in grams weight. That weight is divided by 0.2 to obtain the diamond’s carat weight.

For instance, a diamond weighing 0.1 grams, it is divided by 0.2. The resulting number is 0.5, which means that the stone weighs half a carat.

### Estimating Diamond Carat Weight by Measurements

To convert the carat weight is simple and straightforward. But what happens in case you do not have a scale to measure? In this situation, if you know some of the basic key measurements, you can do it on your own and need no scale to estimate its weight.

A round diamond can be measured by using the formula.

Carat weights = 2 X Diameter in mm X mm in terms of depth X 0.006

The round stone’s diameter is calculated as a straight line that passes through the center of the stone and the two pints is connected on the outer edge of the diamond.

The depth is the total height which is measured vertically from the top facet to the stone’s bottom end.

For instance, a round stone diamond has a diameter of 4mm, depth of 2mm, and then the weight of the stone in terms of a carat is 0.2 ct. it is calculated as 4X4X2X0.006.

This same formula can be applied in oval diamonds as well.

For measuring rectangle, square, princess cut and other similar cuts use the formula length X width X depth X coefficient.

This diamond carat is measured which takes just basic maths knowledge to get an expert in it.