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1ct Diamond (Cabochon, 7.14×4.76mm, White) vs 1ct Moissanite (Cabochon, 7.35×4.9mm, White)


Quick summary: When looked from above (face-up position), 1ct Moissanite (7.35×4.9mm, cabochon cut) appears 6% larger than 1ct Diamond (7.14×4.76mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

1ct Diamond (cabochon cut)
vs
1ct Moissanite (cabochon cut)
white
 
white
7.14×4.76 mm 7.35×4.9 mm
actual size
Actual size of 1ct Diamond (cabochon cut, 7.14×4.76mm, White color)   Actual size of 1ct Moissanite (cabochon cut, 7.35×4.9mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1ct Diamond (cabochon cut, 7.14×4.76mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 1ct Moissanite (cabochon cut, 7.35×4.9mm) 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
29% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Diamond Cabochon (7.14×4.76mm, White) and 1ct Moissanite Cabochon (7.35×4.9mm, 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, Diamond will face-up smaller than Moissanite for a given carat weight, because it has higher specific gravity (3.52 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.


1 Ct Diamond (Cabochon) 1 Ct Moissanite (Cabochon)
7.14×4.76 mm vs 7.35×4.9 mm
27.87 mm²   29.53 mm²
Face-up size outline for 1ct Moissanite (7.35×4.9mm, cabochon cut)
Face-up size outline for 1ct Diamond (7.14×4.76mm, cabochon cut)
1ct Diamond Cabochon (7.14×4.76mm)
1ct Moissanite Cabochon (7.35×4.9mm)
Difference: 6% (1.66 mm²)
1ct Moissanite (Cabochon, 7.35×4.9mm) has approx. 6% more face-up area than 1ct Diamond (Cabochon, 7.14×4.76mm).


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