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1.75ct Ruby (Marquise, 11.72×5.86mm, Red) vs 1.75ct Spinel (Marquise, 12.14×6.07mm, Red)


Quick summary: When looked from above (face-up position), 1.75ct Spinel (12.14×6.07mm, marquise cut) appears 7% larger than 1.75ct Ruby (11.72×5.86mm, marquise cut). See below how they compare side-by-side on a ring and finger.

1.75ct Ruby (marquise cut)
vs
 1.75ct Spinel (marquise cut)
red
 
red
11.72×5.86 mm 12.14×6.07 mm
actual size
Actual size of 1.75ct Ruby (marquise cut, 11.72×5.86mm, Red color)   Actual size of 1.75ct Spinel (marquise cut, 12.14×6.07mm, 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 Ruby (marquise cut, 11.72×5.86mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1.75ct Spinel (marquise cut, 12.14×6.07mm) 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
 35% vs 36%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.75ct Ruby Marquise (11.72×5.86mm, Red) and 1.75ct Spinel Marquise (12.14×6.07mm, 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.


1.75 Ct Ruby (Marquise) 1.75 Ct Spinel (Marquise)
11.72×5.86 mm vs 12.14×6.07 mm
48.76 mm²   52.32 mm²
Face-up size outline for 1.75ct Spinel (12.14×6.07mm, marquise cut)
Face-up size outline for 1.75ct Ruby (11.72×5.86mm, marquise cut)
1.75ct Ruby Marquise (11.72×5.86mm)
1.75ct Spinel Marquise (12.14×6.07mm)
Difference: 7% (3.56 mm²)
1.75ct Spinel (Marquise, 12.14×6.07mm) has approx. 7% more face-up area than 1.75ct Ruby (Marquise, 11.72×5.86mm).


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