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20ct Spinel (Trillion, 20.55×20.55mm, Red) vs 20ct Andesine (Trillion, 22.7×22.7mm, Orange)


Quick summary: When looked from above (face-up position), 20ct Andesine (22.7×22.7mm, trillion cut) appears 22% larger than 20ct Spinel (20.55×20.55mm, trillion cut). See below how they compare side-by-side on a ring and finger.

20ct Spinel (trillion cut)
vs
 20ct Andesine (trillion cut)
red
 
orange
20.55×20.55 mm 22.7×22.7 mm
actual size
Actual size of 20ct Spinel (trillion cut, 20.55×20.55mm, Red color)   Actual size of 20ct Andesine (trillion cut, 22.7×22.7mm, Orange color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 20ct Spinel (trillion cut, 20.55×20.55mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Orange 20ct Andesine (trillion cut, 22.7×22.7mm) 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
 122% vs 135%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 20ct Spinel Trillion (20.55×20.55mm, Red) and 20ct Andesine Trillion (22.7×22.7mm, Orange) 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, Spinel will face-up smaller than Andesine for a given carat weight, because it has higher specific gravity (3.6 vs. 2.67 - this means it's "heavier" compared to Andesine 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.


20 Ct Spinel (Trillion) 20 Ct Andesine (Trillion)
20.55×20.55 mm vs 22.7×22.7 mm
261.83 mm²   319.48 mm²
Face-up size outline for 20ct Andesine (22.7×22.7mm, trillion cut)
Face-up size outline for 20ct Spinel (20.55×20.55mm, trillion cut)
20ct Spinel Trillion (20.55×20.55mm)
20ct Andesine Trillion (22.7×22.7mm)
Difference: 22% (57.65 mm²)
20ct Andesine (Trillion, 22.7×22.7mm) has approx. 22% more face-up area than 20ct Spinel (Trillion, 20.55×20.55mm).


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