How big is a 1.5 carat moissanite?
By HeyGema™ · Updated
In short
A 1.5 carat round moissanite measures about 7.6 mm across (0.30 inches), 3% wider than a 1.5 carat diamond (7.4 mm). An oval of the same weight is 9.4 x 6.5 mm and an emerald cut 8.3 x 5.9 mm.
- 7.6 mmround moissanite, across
- 0.30 inthe same in inches
- 0.30 gweight
- 46%of a size 6 finger's width
Carat to mm calculator
About 7.6 x 7.6 mm
An estimate for a well-cut stone. A deep or shallow cut faces up smaller or bigger.
Round
7.6 mm
Oval
9.4 x 6.5 mm
Cushion
6.6 x 6.6 mm
Princess
6.5 x 6.5 mm
Emerald cut
8.3 x 5.9 mm
Asscher
6.5 x 6.5 mm
Radiant
7.7 x 5.9 mm
Pear
10.0 x 6.5 mm
Marquise
12.3 x 6.1 mm
Heart
7.7 x 7.7 mm
Trillion
8.3 x 8.3 mm
Baguette
9.4 x 4.7 mm
= 5 mm in every picture above
1.5 carat moissanite size by shape
Face-up measurements of a well-cut 1.5 carat moissanite. Moissanite is lighter than diamond (3.22 against 3.52), so the same weight gives a bigger stone, 3% wider across.
- Round
- Length x width: 7.6 mm
- In inches: 0.30 in
- Oval
- Length x width: 9.4 x 6.5 mm
- In inches: 0.37 x 0.26 in
- Cushion
- Length x width: 6.6 x 6.6 mm
- In inches: 0.26 x 0.26 in
- Princess
- Length x width: 6.5 x 6.5 mm
- In inches: 0.26 x 0.26 in
- Emerald cut
- Length x width: 8.3 x 5.9 mm
- In inches: 0.32 x 0.23 in
- Asscher
- Length x width: 6.5 x 6.5 mm
- In inches: 0.26 x 0.26 in
- Radiant
- Length x width: 7.7 x 5.9 mm
- In inches: 0.30 x 0.23 in
- Pear
- Length x width: 10.0 x 6.5 mm
- In inches: 0.39 x 0.26 in
- Marquise
- Length x width: 12.3 x 6.1 mm
- In inches: 0.48 x 0.24 in
- Heart
- Length x width: 7.7 x 7.7 mm
- In inches: 0.30 x 0.30 in
- Trillion
- Length x width: 8.3 x 8.3 mm
- In inches: 0.32 x 0.32 in
- Baguette
- Length x width: 9.4 x 4.7 mm
- In inches: 0.37 x 0.19 in
1.5 carat moissanite against other gems
- Diamond
- Round, 1.5 carat: 7.4 mm
- Sapphire
- Round, 1.5 carat: 7.1 mm
- Ruby
- Round, 1.5 carat: 7.1 mm
- Emerald
- Round, 1.5 carat: 8.0 mm
- Aquamarine
- Round, 1.5 carat: 8.1 mm
- Morganite
- Round, 1.5 carat: 8.0 mm
- Tanzanite
- Round, 1.5 carat: 7.5 mm
- Topaz
- Round, 1.5 carat: 7.4 mm
- Moissanite (this page)
- Round, 1.5 carat: 7.6 mm
1.5 carat moissanite on a finger
- 4
- Finger width: 14.9 mm
- Round covers: 51%
- Oval covers: 44%
- 5
- Finger width: 15.7 mm
- Round covers: 48%
- Oval covers: 41%
- 6
- Finger width: 16.5 mm
- Round covers: 46%
- Oval covers: 39%
- 7
- Finger width: 17.3 mm
- Round covers: 44%
- Oval covers: 37%
- 8
- Finger width: 18.1 mm
- Round covers: 42%
- Oval covers: 36%
- 9
- Finger width: 18.9 mm
- Round covers: 40%
- Oval covers: 34%
Moissanite at nearby weights
- 1 carat moissanite
- Round diameter: 6.6 mm
- 1.5 ct (this page)
- Round diameter: 7.6 mm
- 2 carat moissanite
- Round diameter: 8.4 mm
Questions
A round 1.5 carat moissanite is about 7.6 mm across. Other shapes are longer than they are wide: an oval is 9.4 x 6.5 mm.
Yes. A round 1.5 carat moissanite is 3% wider than a 1.5 carat diamond (7.4 mm).
0.30 grams. A carat is 200 milligrams for every gem.
A round 1.5 carat moissanite covers 46% of the width of a size 6 finger. Compare it with a ring you have tried on in the finger chart above.