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18ct Almandine (Round, 15.6×15.6mm, Dark Red) vs 18ct Ruby (Round, 15.67×15.67mm, Red)


Quick summary: When looked from above (face-up position), 18ct Ruby (15.67×15.67mm, round cut) appears 0.9% larger than 18ct Almandine (15.6×15.6mm, round cut). See below how they compare side-by-side on a ring and finger.

18ct Almandine (round cut)
vs
 18ct Ruby (round cut)
dark red
 
red
15.6×15.6 mm 15.67×15.67 mm
actual size
Actual size of 18ct Almandine (round cut, 15.6×15.6mm, Dark Red color)   Actual size of 18ct Ruby (round cut, 15.67×15.67mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Red 18ct Almandine (round cut, 15.6×15.6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 18ct Ruby (round cut, 15.67×15.67mm) 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
 93% vs 93%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Almandine Round (15.6×15.6mm, Dark Red) and 18ct Ruby Round (15.67×15.67mm, 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 slightly smaller than Ruby for a given carat weight, because it has higher specific gravity (4.05 vs. 4 - this means it's "slightly heavier" compared to Ruby 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.


18 Ct Almandine (Round) 18 Ct Ruby (Round)
15.6×15.6 mm vs 15.67×15.67 mm
191.13 mm²   192.85 mm²
Face-up size outline for 18ct Ruby (15.67×15.67mm, round cut)
Face-up size outline for 18ct Almandine (15.6×15.6mm, round cut)
18ct Almandine Round (15.6×15.6mm)
18ct Ruby Round (15.67×15.67mm)
Difference: 0.9% (1.72 mm²)
18ct Ruby (Round, 15.67×15.67mm) has approx. 0.9% more face-up area than 18ct Almandine (Round, 15.6×15.6mm).


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