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Moissanite Size Chart


How Moissanite is measured for size

Moissanite is measured for size based on its length and width, rather than carat weight like diamonds. As Moissanite is approximately 10% lighter than a natural diamond, its size is expressed in millimeters rather than carats.

The relationship between the two measurements is straightforward. For instance, a 6.5 mm Moissanite round cut gemstone would have a similar size to a 1 carat diamond, though it would weigh less. Visually, they would appear identical. In other words, 6.5mm is equivalent to 1.0 carat.


Your Perfect Size

Pictured - Oval Moissanite

5x7mm (1.0ct)

8x6mm (1.50ct)

9x6mm (1.80ct)

9x7mm (2.10ct)

10x7mm (2.50ct)

10x8mm (3.0ct)

Click below to use our interactive guide to find your perfect size


 
Do carats still apply to Moissanites?
To ensure ease of understanding for our clients, we mention the size of Moissanites in carats, as it is the most familiar measurement. If you have a specific carat weight in mind, we will gladly assist you in converting it to the equivalent Moissanite size. Our aim is to provide a seamless experience and help you find the perfect Moissanite size that aligns with your preferences.

 

 

 

Round mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
6.5mm 1.00ct
7.5mm

1.50ct

8.0mm 2.0ct
8.5mm 2.50ct
9.0mm 3.0ct
9.5mm 3.5ct
10.0mm 4.00ct
10.5mm 4.50ct
11.0mm 5.00ct
11.5mm 5.80ct

Cushion mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
6.5mm 1.30ct
7.0mm 1.70ct
7.5mm 2.0ct
8mm 2.40ct
8.5mm 2.80ct
9mm 3.30ct
9.5mm 4.20ct
10mm 5.0ct
10.5mm 5.90ct

Princess mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
6.5mm 1.70ct
7.0mm 2.10ct
7.5mm 2.30ct
8mm 2.80ct
8.5mm 3.60ct
9mm 4.30ct
10mm 5.70ct

Oval mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
7x5mm 1.00ct
8x6mm 1.50ct
9x6mm 1.80ct
9x7mm 2.10ct
10x7mm 2.50ct
10x7.5mm 2.80ct
10x8mm 3.00ct
11x9mm 4.20ct
12x8mm 4.40ct
13x9mm 5.50ct

Pear mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
8x5mm 1.00ct
9x6mm 1.50ct
10x7mm 2.10ct
012x8mm 3.60ct
13x9mm 5.20ct

Radiant mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
6x4mm 0.70ct
7x5mm 1.20ct
8x6mm 1.80ct
9x7mm 2.70ct
10x8mm 3.90ct
11x9mm 5.30ct

Emerald mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
7x5mm 1.00ct
8x6mm 1.70ct
9x7mm 2.50ct
10x8mm 3.50ct
11x9mm 5.20ct

Marquise mm size to carat size chart

Moissanite Size Diamond Equivalent Weight (Dew)
10x5mm 1.0ct
11x5.5mm 1.40ct
12x6mm 1.80ct
13x6.5mm 1.98ct
14x7mm 2.80ct
16x8mm 3.86ct