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0.25ct Diamond (Marquise, 6.54×3.27mm, White) vs 0.25ct Moissanite (Marquise, 6.58×3.29mm, White)


Quick summary: When looked from above (face-up position), 0.25ct Moissanite (6.58×3.29mm, marquise cut) appears 1% larger than 0.25ct Diamond (6.54×3.27mm, marquise cut). See below how they compare side-by-side on a ring and finger.

0.25ct Diamond (marquise cut)
vs
0.25ct Moissanite (marquise cut)
white
 
white
6.54×3.27 mm 6.58×3.29 mm
actual size
Actual size of 0.25ct Diamond (marquise cut, 6.54×3.27mm, White color)   Actual size of 0.25ct Moissanite (marquise cut, 6.58×3.29mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.25ct Diamond (marquise cut, 6.54×3.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.25ct Moissanite (marquise cut, 6.58×3.29mm) 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
20% vs 20%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.25ct Diamond Marquise (6.54×3.27mm, White) and 0.25ct Moissanite Marquise (6.58×3.29mm, 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.


0.25 Ct Diamond (Marquise) 0.25 Ct Moissanite (Marquise)
6.54×3.27 mm vs 6.58×3.29 mm
15.18 mm²   15.37 mm²
Face-up size outline for 0.25ct Moissanite (6.58×3.29mm, marquise cut)
Face-up size outline for 0.25ct Diamond (6.54×3.27mm, marquise cut)
0.25ct Diamond Marquise (6.54×3.27mm)
0.25ct Moissanite Marquise (6.58×3.29mm)
Difference: 1% (0.19 mm²)
0.25ct Moissanite (Marquise, 6.58×3.29mm) has approx. 1% more face-up area than 0.25ct Diamond (Marquise, 6.54×3.27mm).


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