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2ct Ruby (Trillion, 9.21×9.21mm, Red) vs 2ct Spinel (Trillion, 9.54×9.54mm, Red)


Quick summary: When looked from above (face-up position), 2ct Spinel (9.54×9.54mm, trillion cut) appears 7% larger than 2ct Ruby (9.21×9.21mm, trillion cut). See below how they compare side-by-side on a ring and finger.

2ct Ruby (trillion cut)
vs
 2ct Spinel (trillion cut)
red
 
red
9.21×9.21 mm 9.54×9.54 mm
actual size
Actual size of 2ct Ruby (trillion cut, 9.21×9.21mm, Red color)   Actual size of 2ct Spinel (trillion cut, 9.54×9.54mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 2ct Ruby (trillion cut, 9.21×9.21mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 2ct Spinel (trillion cut, 9.54×9.54mm) 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
 55% vs 57%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2ct Ruby Trillion (9.21×9.21mm, Red) and 2ct Spinel Trillion (9.54×9.54mm, 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.


2 Ct Ruby (Trillion) 2 Ct Spinel (Trillion)
9.21×9.21 mm vs 9.54×9.54 mm
52.59 mm²   56.43 mm²
Face-up size outline for 2ct Spinel (9.54×9.54mm, trillion cut)
Face-up size outline for 2ct Ruby (9.21×9.21mm, trillion cut)
2ct Ruby Trillion (9.21×9.21mm)
2ct Spinel Trillion (9.54×9.54mm)
Difference: 7% (3.84 mm²)
2ct Spinel (Trillion, 9.54×9.54mm) has approx. 7% more face-up area than 2ct Ruby (Trillion, 9.21×9.21mm).


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