Moissanite Size Chart

What is a Moissanite Size Chart?

A moissanite size chart makes it easier to comprehend the true physical characteristics of a stone. Usually, it provides the cut's size in millimeters (mm) together with the weight in carats.

The most important point to keep in mind is that moissanite is less dense than diamonds. Accordingly, a 1-carat moissanite will have a somewhat greater physical size than a 1-carat diamond. The most precise approach to see how a stone will appear when placed in a piece is via a size chart.

Understanding Millimeter (mm) vs Carat

Weight is measured in carats (ct). Two hundred milligrams (0.2 grams) are equivalent to one carat.

The actual width and height of a stone are measured in millimeters (mm), a unit of length. Two stones with the same carat weight can have entirely distinct appearances since moissanite is around 10%–15% lighter than a diamond of the same size.

Because of this, moissanite is typically sold and described using its exact millimeter dimensions rather than just its carat weight.

Diamond Equivalent Weight (DEW)

A standardized reference called DEW (Diamond Equivalent Weight) indicates how many carats a diamond would weigh if it were the same size (in millimeters) as a moissanite stone. For instance, a 6.5mm round moissanite has the same appearance as a 1.00 carat diamond but weighs only 0.88 carats. So it is commonly marketed as a "1 ct DEW moissanite."

How to Use The Size Chart

Choose a shape from the following list: round, oval, emerald, etc.
Pay attention to the millimeter measurements versus just the weight in carats. This is the actual size of the face of the stone.
To find out the diamond carat size the stone physically resembles, look at the DEW column.
The real physical weight of the stone in carats can be found in the Moissanite Weight column.