How many carats is a 15 mm moissanite?
By HeyGema™ · Updated
In short
A 15 mm round moissanite is labeled 12.58 carat, its diamond equivalent weight (DEW). On a scale it weighs about 11.51 carat, because moissanite is lighter than diamond.
- 12.58 ctdiamond equivalent weight
- 11.51 cttrue weight
- 0.59 in15 mm in inches
Carat to mm calculator
About 11.51 carat
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
15 mm moissanite by shape
For shapes that are longer than they are wide, the long side is 15 mm and the width follows the usual ratio.
- Round
- Size: 15 mm
- DEW: 12.58 ct
- True weight: 11.51 ct
- Oval
- Size: 15 mm x 10.3 mm
- DEW: 6.62 ct
- True weight: 6.06 ct
- Cushion
- Size: 15 mm x 15.0 mm
- DEW: 19.22 ct
- True weight: 17.58 ct
- Princess
- Size: 15 mm x 15.0 mm
- DEW: 20.29 ct
- True weight: 18.56 ct
- Emerald cut
- Size: 15 mm x 10.7 mm
- DEW: 9.84 ct
- True weight: 9 ct
- Asscher
- Size: 15 mm x 15.0 mm
- DEW: 20.29 ct
- True weight: 18.56 ct
- Radiant
- Size: 15 mm x 11.5 mm
- DEW: 12.29 ct
- True weight: 11.24 ct
- Pear
- Size: 15 mm x 9.7 mm
- DEW: 5.47 ct
- True weight: 5 ct
- Marquise
- Size: 15 mm x 7.5 mm
- DEW: 3 ct
- True weight: 2.74 ct
- Heart
- Size: 15 mm x 15.0 mm
- DEW: 12.29 ct
- True weight: 11.24 ct
- Trillion
- Size: 15 mm x 15.0 mm
- DEW: 9.84 ct
- True weight: 9 ct
- Baguette
- Size: 15 mm x 7.5 mm
- DEW: 6.59 ct
- True weight: 6.03 ct
Nearby moissanite sizes
- 14 mm
- DEW: 10.23 ct
- True weight: 9.36 ct
- 15 mm (this page)
- DEW: 12.58 ct
- True weight: 11.51 ct
Questions
A round 15 mm moissanite is 12.58 carat DEW (the weight of a diamond that size) and about 11.51 carat on a scale.
A 15 mm moissanite is the same width as a 15 mm diamond, which weighs 12.58 carat. The moissanite weighs less.
15 mm is 0.59 inches.