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0.75ct Ruby (Pear, 7.72×4.65mm, Red) vs 0.75ct Spinel (Pear, 8×4.82mm, Red)


Quick summary: When looked from above (face-up position), 0.75ct Spinel (8×4.82mm, pear cut) appears 7% larger than 0.75ct Ruby (7.72×4.65mm, pear cut). See below how they compare side-by-side on a ring and finger.

0.75ct Ruby (pear cut)
vs
 0.75ct Spinel (pear cut)
red
 
red
7.72×4.65 mm 8×4.82 mm
actual size
Actual size of 0.75ct Ruby (pear cut, 7.72×4.65mm, Red color)   Actual size of 0.75ct Spinel (pear cut, 8×4.82mm, 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 (pear cut, 7.72×4.65mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.75ct Spinel (pear cut, 8×4.82mm) 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 Pear (7.72×4.65mm, Red) and 0.75ct Spinel Pear (8×4.82mm, 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 (Pear) 0.75 Ct Spinel (Pear)
7.72×4.65 mm vs 8×4.82 mm
26.21 mm²   28.15 mm²
Face-up size outline for 0.75ct Spinel (8×4.82mm, pear cut)
Face-up size outline for 0.75ct Ruby (7.72×4.65mm, pear cut)
0.75ct Ruby Pear (7.72×4.65mm)
0.75ct Spinel Pear (8×4.82mm)
Difference: 7% (1.94 mm²)
0.75ct Spinel (Pear, 8×4.82mm) has approx. 7% more face-up area than 0.75ct Ruby (Pear, 7.72×4.65mm).


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