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18ct Almandine (Emerald, 16.66×12.34mm, Dark Red) vs 18ct Ruby (Emerald, 16.74×12.4mm, Red)


Quick summary: When looked from above (face-up position), 18ct Ruby (16.74×12.4mm, emerald cut) appears 1% larger than 18ct Almandine (16.66×12.34mm, emerald cut). See below how they compare side-by-side on a ring and finger.

18ct Almandine (emerald cut)
vs
 18ct Ruby (emerald cut)
dark red
 
red
16.66×12.34 mm 16.74×12.4 mm
actual size
Actual size of 18ct Almandine (emerald cut, 16.66×12.34mm, Dark Red color)   Actual size of 18ct Ruby (emerald cut, 16.74×12.4mm, 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 (emerald cut, 16.66×12.34mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 18ct Ruby (emerald cut, 16.74×12.4mm) 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 74%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Almandine Emerald (16.66×12.34mm, Dark Red) and 18ct Ruby Emerald (16.74×12.4mm, 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 (Emerald) 18 Ct Ruby (Emerald)
16.66×12.34 mm vs 16.74×12.4 mm
191.19 mm²   193.05 mm²
Face-up size outline for 18ct Ruby (16.74×12.4mm, emerald cut)
Face-up size outline for 18ct Almandine (16.66×12.34mm, emerald cut)
18ct Almandine Emerald (16.66×12.34mm)
18ct Ruby Emerald (16.74×12.4mm)
Difference: 1% (1.86 mm²)
18ct Ruby (Emerald, 16.74×12.4mm) has approx. 1% more face-up area than 18ct Almandine (Emerald, 16.66×12.34mm).


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