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3.25ct Ruby (Emerald, 9.46×7.01mm, Red) vs 1ct Spinel (Pear, 8.6×5.18mm, Red)


Quick summary: When looked from above (face-up position), 3.25ct Ruby (9.46×7.01mm, emerald cut) appears 90% larger than 1ct Spinel (8.6×5.18mm, pear cut). See below how they compare side-by-side on a ring and finger.

3.25ct Ruby (emerald cut)
vs
 1ct Spinel (pear cut)
red
 
red
9.46×7.01 mm 8.6×5.18 mm
actual size
Actual size of 3.25ct Ruby (emerald cut, 9.46×7.01mm, Red color)   Actual size of 1ct Spinel (pear cut, 8.6×5.18mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 3.25ct Ruby (emerald cut, 9.46×7.01mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1ct Spinel (pear cut, 8.6×5.18mm) 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
 42% vs 31%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3.25ct Ruby Emerald (9.46×7.01mm, Red) and 1ct Spinel Pear (8.6×5.18mm, 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.


3.25 Ct Ruby (Emerald) 1 Ct Spinel (Pear)
9.46×7.01 mm vs 8.6×5.18 mm
61.67 mm²   32.52 mm²
Face-up size outline for 3.25ct Ruby (9.46×7.01mm, emerald cut)
Face-up size outline for 1ct Spinel (8.6×5.18mm, pear cut)
3.25ct Ruby Emerald (9.46×7.01mm)
1ct Spinel Pear (8.6×5.18mm)
Difference: 90% (29.15 mm²)
3.25ct Ruby (Emerald, 9.46×7.01mm) has approx. 90% more face-up area than 1ct Spinel (Pear, 8.6×5.18mm).


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