×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

0.25ct Diamond (Round, 4.09×4.09mm, White) vs 0.25ct Moissanite (Round, 4.23×4.23mm, White)


Quick summary: When looked from above (face-up position), 0.25ct Moissanite (4.23×4.23mm, round cut) appears 7% larger than 0.25ct Diamond (4.09×4.09mm, round cut). See below how they compare side-by-side on a ring and finger.

0.25ct Diamond (round cut)
vs
 0.25ct Moissanite (round cut)
white
 
white
4.09×4.09 mm 4.23×4.23 mm
actual size
Actual size of 0.25ct Diamond (round cut, 4.09×4.09mm, White color)   Actual size of 0.25ct Moissanite (round cut, 4.23×4.23mm, 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 (round cut, 4.09×4.09mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.25ct Moissanite (round cut, 4.23×4.23mm) 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
 25% vs 26%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.25ct Diamond Round (4.09×4.09mm, White) and 0.25ct Moissanite Round (4.23×4.23mm, 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 (Round) 0.25 Ct Moissanite (Round)
4.09×4.09 mm vs 4.23×4.23 mm
13.14 mm²   14.05 mm²
Face-up size outline for 0.25ct Moissanite (4.23×4.23mm, round cut)
Face-up size outline for 0.25ct Diamond (4.09×4.09mm, round cut)
0.25ct Diamond Round (4.09×4.09mm)
0.25ct Moissanite Round (4.23×4.23mm)
Difference: 7% (0.91 mm²)
0.25ct Moissanite (Round, 4.23×4.23mm) has approx. 7% more face-up area than 0.25ct Diamond (Round, 4.09×4.09mm).


Popular comparisons: