MOISSANITE SIZE CHART

Carat Definition: What Is a Carat?

Same as Diamond. While many confuse carat as a measurement of physical size, it is actually a measurement of weight used to describe diamonds and other gemstones. One carat equals 0.2 grams, about the same weight as a paperclip.  

To understand what diamond carat measures, it’s helpful to know the origins of the carat system. It began with carob seeds that early gem traders used as small, uniform counterweights to their balance scales. At that time, gemstone measurement varied internationally; there was no standard. It wasn’t until 1913 that the world adopted the modern metric carat. Now, a carat weighs the same in every corner of the globe.  

As one of the four factors that describe and determine a diamond’s quality and value, carat should not be confused with ‘karat,’ a unit used to measure the purity of gold.

How Big is a Carat?

A carat is synonymous with weight, not with the size of a diamond or other gemstone. For example, because of varying densities, a one-carat round diamond may measure 6.4mm, while a one-carat round sapphire might measure 6.0mm. Shape, cut, and depth also play a role in determining how big a carat appears.

This diagram illustrates the typical size relationship of round diamonds in increasing carat weights. Remember, every gemstone is unique, and the appearance of carat weight varies.

 

How About Moissanite Carat?

If you're in the market for a stunning moissanite gemstone, it's important to find the perfect size that suits your preferences and style. Moissanite, known for its brilliance and sparkle, is a popular alternative to traditional diamonds. With our comprehensive moissanite size chart, you can easily compare different carat weights and dimensions to make an informed decision.

Our size chart provides detailed information on the millimeter measurements for various moissanite carat sizes. Whether you're looking for a dazzling moissanite engagement ring, earrings, pendant, or any other jewelry piece, this size chart will serve as a helpful guide to find the ideal size that matches your vision.

Diamond Equivalent Weight" (DEW) when exploring different carat sizes. DEW is a term used to describe the approximate size of a moissanite gemstone in comparison to a diamond of the same weight.

Moissanite has different physical properties than diamonds, which affect its density and light dispersion. As a result, moissanite gems have a different size appearance compared to diamonds of the same carat weight. To provide an easy reference for consumers, the DEW measurement allows you to understand how a moissanite gemstone compares to a diamond in terms of size.

Carat weight (ct.) is the standard unit of measurement for gemstones, including diamonds. It refers to the weight of the stone, with one carat equaling 200 milligrams. 

When using the moissanite size chart, the carat weight refers to the approximate weight of the moissanite gemstone. By understanding the carat weight and corresponding DEW measurement, you can have a better idea of the size and visual impact of the moissanite stone you're considering.

0.4ct-4.5mm
0.5ct-5mm
0.6ct-5.5mm
0.8ct-6mm
1.0ct-6.5mm
1.2ct-7mm
1.5ct-7.5mm
2.0ct-8mm
3.0ct-9mm
4.0ct-10mm