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5ct Spinel (Trillion, 12.45×12.45mm, Red) vs 5ct Sapphire (Trillion, 12.02×12.02mm, Blue)


Quick summary: When looked from above (face-up position), 5ct Spinel (12.45×12.45mm, trillion cut) appears 7% larger than 5ct Sapphire (12.02×12.02mm, trillion cut). See below how they compare side-by-side on a ring and finger.

5ct Spinel (trillion cut)
vs
 5ct Sapphire (trillion cut)
red
 
blue
12.45×12.45 mm 12.02×12.02 mm
actual size
Actual size of 5ct Spinel (trillion cut, 12.45×12.45mm, Red color)   Actual size of 5ct Sapphire (trillion cut, 12.02×12.02mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 5ct Spinel (trillion cut, 12.45×12.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 5ct Sapphire (trillion cut, 12.02×12.02mm) 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
 74% vs 72%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Spinel Trillion (12.45×12.45mm, Red) and 5ct Sapphire Trillion (12.02×12.02mm, Blue) 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, Sapphire 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.


5 Ct Spinel (Trillion) 5 Ct Sapphire (Trillion)
12.45×12.45 mm vs 12.02×12.02 mm
96.1 mm²   89.58 mm²
Face-up size outline for 5ct Spinel (12.45×12.45mm, trillion cut)
Face-up size outline for 5ct Sapphire (12.02×12.02mm, trillion cut)
5ct Spinel Trillion (12.45×12.45mm)
5ct Sapphire Trillion (12.02×12.02mm)
Difference: 7% (6.52 mm²)
5ct Spinel (Trillion, 12.45×12.45mm) has approx. 7% more face-up area than 5ct Sapphire (Trillion, 12.02×12.02mm).


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