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15ct Cubic Zirconia (Cabochon, 15.05×10.03mm, White) vs 15ct Moissanite (Cabochon, 18.15×12.1mm, White)


Quick summary: When looked from above (face-up position), 15ct Moissanite (18.15×12.1mm, cabochon cut) appears 45% larger than 15ct Cubic Zirconia (15.05×10.03mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

15ct Cubic Zirconia (cabochon cut)
vs
 15ct Moissanite (cabochon cut)
white
 
white
15.05×10.03 mm 18.15×12.1 mm
actual size
Actual size of 15ct Cubic Zirconia (cabochon cut, 15.05×10.03mm, White color)   Actual size of 15ct Moissanite (cabochon cut, 18.15×12.1mm, White color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 15ct Cubic Zirconia (cabochon cut, 15.05×10.03mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 15ct Moissanite (cabochon cut, 18.15×12.1mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 60% vs 72%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 15ct Cubic Zirconia Cabochon (15.05×10.03mm, White) and 15ct Moissanite Cabochon (18.15×12.1mm, White) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Cubic Zirconia will face-up smaller than Moissanite for a given carat weight, because it has higher specific gravity (5.65 vs. 3.22 - this means it's "heavier" compared to Moissanite of the same size). Face-up size also depends heavily on the proportions of the cut.

Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


15 Ct Cubic Zirconia (Cabochon) 15 Ct Moissanite (Cabochon)
15.05×10.03 mm vs 18.15×12.1 mm
123.78 mm²   180.08 mm²
Face-up size outline for 15ct Moissanite (18.15×12.1mm, cabochon cut)
Face-up size outline for 15ct Cubic Zirconia (15.05×10.03mm, cabochon cut)
15ct Cubic Zirconia Cabochon (15.05×10.03mm)
15ct Moissanite Cabochon (18.15×12.1mm)
Difference: 45% (56.3 mm²)
15ct Moissanite (Cabochon, 18.15×12.1mm) has approx. 45% more face-up area than 15ct Cubic Zirconia (Cabochon, 15.05×10.03mm).


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