What size Moissanite stones compare to a specific equivalent diamond carat weight?
A. Since moissanite is slightly less dense than diamonds, it is better to refer to moissanite stones in terms of size. However, we understand that most people understand gemstones by carat rather than mm. Here is a chart: 3.0mm round: 0.10 ct tw 3.5mm round: 0.15 ct tw 4.0mm round: 0.25 ct tw 5.0mm round: 0.50 ct tw 5.5mm round: 0.66 ct tw 6.0mm round: 0.75 ct tw 6.5mm round: 1.00 ct tw 7.0mm round: 1.25 ct tw 7.5mm round: 1.50 ct tw 8.0mm round: 2.00 ct tw 8.5mm round: 2.50 ct tw 9.0mm round: 3.00 ct tw 9.5mm round: 3.50 ct tw 10.0mm round: 4.00 ct tw 10.5mm round: 4.50 ct tw 11.0mm round: 5.00 ct tw 12.5mm round: 5.50 ct tw 12.0mm round: 6.00 ct tw 13.0mm round: 8.00 ct tw 14.0mm round: 10.00 ct tw 15.0mm round: 12.00 ct tw 16.0mm round: 15.00 ct tw Note: For the list of corresponding carat weights to mm sizes for other moissanite stone shapes, please visit our loose moissanite stones page.
