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0.5ct Ruby (Cushion, 4.39×4.39mm, Red) vs 0.5ct Spinel (Cushion, 4.55×4.55mm, Red)


Quick summary: When looked from above (face-up position), 0.5ct Spinel (4.55×4.55mm, cushion cut) appears 7% larger than 0.5ct Ruby (4.39×4.39mm, cushion cut). See below how they compare side-by-side on a ring and finger.

0.5ct Ruby (cushion cut)
vs
 0.5ct Spinel (cushion cut)
red
 
red
4.39×4.39 mm 4.55×4.55 mm
actual size
Actual size of 0.5ct Ruby (cushion cut, 4.39×4.39mm, Red color)   Actual size of 0.5ct Spinel (cushion cut, 4.55×4.55mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 0.5ct Ruby (cushion cut, 4.39×4.39mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.5ct Spinel (cushion cut, 4.55×4.55mm) 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
 26% vs 27%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.5ct Ruby Cushion (4.39×4.39mm, Red) and 0.5ct Spinel Cushion (4.55×4.55mm, Red) 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, Ruby will face-up smaller than Spinel for a given carat weight, because it has higher specific gravity (4 vs. 3.6 - this means it's "heavier" compared to Spinel 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 Ruby (Cushion) 0.5 Ct Spinel (Cushion)
4.39×4.39 mm vs 4.55×4.55 mm
17.34 mm²   18.63 mm²
Face-up size outline for 0.5ct Spinel (4.55×4.55mm, cushion cut)
Face-up size outline for 0.5ct Ruby (4.39×4.39mm, cushion cut)
0.5ct Ruby Cushion (4.39×4.39mm)
0.5ct Spinel Cushion (4.55×4.55mm)
Difference: 7% (1.29 mm²)
0.5ct Spinel (Cushion, 4.55×4.55mm) has approx. 7% more face-up area than 0.5ct Ruby (Cushion, 4.39×4.39mm).


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