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0.85ct Emerald (Oval, 8.18×5.45mm, Green) vs 12.5ct Ruby (Round, 13.87×13.87mm, Red)


Quick summary: When looked from above (face-up position), 12.5ct Ruby (13.87×13.87mm, round cut) appears 4.1 times larger than 0.85ct Emerald (8.18×5.45mm, oval cut). See below how they compare side-by-side on a ring and finger.

0.85ct Emerald (oval cut)
vs
 12.5ct Ruby (round cut)
green
 
red
8.18×5.45 mm 13.87×13.87 mm
actual size
Actual size of 0.85ct Emerald (oval cut, 8.18×5.45mm, Green color)   Actual size of 12.5ct Ruby (round cut, 13.87×13.87mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 0.85ct Emerald (oval cut, 8.18×5.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 12.5ct Ruby (round cut, 13.87×13.87mm) 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
 33% vs 83%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.85ct Emerald Oval (8.18×5.45mm, Green) and 12.5ct Ruby Round (13.87×13.87mm, 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 Emerald for a given carat weight, because it has higher specific gravity (4 vs. 2.72 - this means it's "heavier" compared to Emerald 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.


0.85 Ct Emerald (Oval) 12.5 Ct Ruby (Round)
8.18×5.45 mm vs 13.87×13.87 mm
36.56 mm²   151.09 mm²
Face-up size outline for 12.5ct Ruby (13.87×13.87mm, round cut)
Face-up size outline for 0.85ct Emerald (8.18×5.45mm, oval cut)
0.85ct Emerald Oval (8.18×5.45mm)
12.5ct Ruby Round (13.87×13.87mm)
Difference: 313% (114.53 mm²)
12.5ct Ruby (Round, 13.87×13.87mm) has approx. 313% more face-up area than 0.85ct Emerald (Oval, 8.18×5.45mm). In other words, it's 4.13x larger.


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