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0.75ct Ruby (Oval, 6.96×4.64mm, Red) vs 0.75ct Spinel (Oval, 7.22×4.81mm, Red)


Quick summary: When looked from above (face-up position), 0.75ct Spinel (7.22×4.81mm, oval cut) appears 8% larger than 0.75ct Ruby (6.96×4.64mm, oval cut). See below how they compare side-by-side on a ring and finger.

0.75ct Ruby (oval cut)
vs
 0.75ct Spinel (oval cut)
red
 
red
6.96×4.64 mm 7.22×4.81 mm
actual size
Actual size of 0.75ct Ruby (oval cut, 6.96×4.64mm, Red color)   Actual size of 0.75ct Spinel (oval cut, 7.22×4.81mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 0.75ct Ruby (oval cut, 6.96×4.64mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.75ct Spinel (oval cut, 7.22×4.81mm) 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
 28% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.75ct Ruby Oval (6.96×4.64mm, Red) and 0.75ct Spinel Oval (7.22×4.81mm, 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.


0.75 Ct Ruby (Oval) 0.75 Ct Spinel (Oval)
6.96×4.64 mm vs 7.22×4.81 mm
26.48 mm²   28.48 mm²
Face-up size outline for 0.75ct Spinel (7.22×4.81mm, oval cut)
Face-up size outline for 0.75ct Ruby (6.96×4.64mm, oval cut)
0.75ct Ruby Oval (6.96×4.64mm)
0.75ct Spinel Oval (7.22×4.81mm)
Difference: 8% (2 mm²)
0.75ct Spinel (Oval, 7.22×4.81mm) has approx. 8% more face-up area than 0.75ct Ruby (Oval, 6.96×4.64mm).


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