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0.5ct Diamond (Heart, 5.21×5.21mm, White) vs 0.5ct Moissanite (Heart, 5.34×5.34mm, White)


Quick summary: When looked from above (face-up position), 0.5ct Moissanite (5.34×5.34mm, heart cut) appears 5% larger than 0.5ct Diamond (5.21×5.21mm, heart cut). See below how they compare side-by-side on a ring and finger.

0.5ct Diamond (heart cut)
vs
0.5ct Moissanite (heart cut)
white
 
white
5.21×5.21 mm 5.34×5.34 mm
actual size
Actual size of 0.5ct Diamond (heart cut, 5.21×5.21mm, White color)   Actual size of 0.5ct Moissanite (heart cut, 5.34×5.34mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.5ct Diamond (heart cut, 5.21×5.21mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.5ct Moissanite (heart cut, 5.34×5.34mm) 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
31% vs 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.5ct Diamond Heart (5.21×5.21mm, White) and 0.5ct Moissanite Heart (5.34×5.34mm, 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.


0.5 Ct Diamond (Heart) 0.5 Ct Moissanite (Heart)
5.21×5.21 mm vs 5.34×5.34 mm
19.54 mm²   20.53 mm²
Face-up size outline for 0.5ct Moissanite (5.34×5.34mm, heart cut)
Face-up size outline for 0.5ct Diamond (5.21×5.21mm, heart cut)
0.5ct Diamond Heart (5.21×5.21mm)
0.5ct Moissanite Heart (5.34×5.34mm)
Difference: 5% (0.99 mm²)
0.5ct Moissanite (Heart, 5.34×5.34mm) has approx. 5% more face-up area than 0.5ct Diamond (Heart, 5.21×5.21mm).


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