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1.75ct Spinel (Trillion, 9.12×9.12mm, Red) vs 1.75ct Almandine (Trillion, 8.77×8.77mm, Dark Red)


Quick summary: When looked from above (face-up position), 1.75ct Spinel (9.12×9.12mm, trillion cut) appears 8% larger than 1.75ct Almandine (8.77×8.77mm, trillion cut). See below how they compare side-by-side on a ring and finger.

1.75ct Spinel (trillion cut)
vs
 1.75ct Almandine (trillion cut)
red
 
dark red
9.12×9.12 mm 8.77×8.77 mm
actual size
Actual size of 1.75ct Spinel (trillion cut, 9.12×9.12mm, Red color)   Actual size of 1.75ct Almandine (trillion cut, 8.77×8.77mm, Dark Red color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 1.75ct Spinel (trillion cut, 9.12×9.12mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Dark Red 1.75ct Almandine (trillion cut, 8.77×8.77mm) 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
 54% vs 52%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.75ct Spinel Trillion (9.12×9.12mm, Red) and 1.75ct Almandine Trillion (8.77×8.77mm, Dark 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, Almandine will face-up smaller than Spinel for a given carat weight, because it has higher specific gravity (4.05 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.


1.75 Ct Spinel (Trillion) 1.75 Ct Almandine (Trillion)
9.12×9.12 mm vs 8.77×8.77 mm
51.57 mm²   47.69 mm²
Face-up size outline for 1.75ct Spinel (9.12×9.12mm, trillion cut)
Face-up size outline for 1.75ct Almandine (8.77×8.77mm, trillion cut)
1.75ct Spinel Trillion (9.12×9.12mm)
1.75ct Almandine Trillion (8.77×8.77mm)
Difference: 8% (3.88 mm²)
1.75ct Spinel (Trillion, 9.12×9.12mm) has approx. 8% more face-up area than 1.75ct Almandine (Trillion, 8.77×8.77mm).


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