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25ct Ruby (Round, 17.48×17.48mm, Red) vs 0.25ct Emerald (Emerald, 4.59×3.4mm, Green)


Quick summary: When looked from above (face-up position), 25ct Ruby (17.48×17.48mm, round cut) appears 16.5 times larger than 0.25ct Emerald (4.59×3.4mm, emerald cut). See below how they compare side-by-side on a ring and finger.

25ct Ruby (round cut)
vs
 0.25ct Emerald (emerald cut)
red
 
green
17.48×17.48 mm 4.59×3.4 mm
actual size
Actual size of 25ct Ruby (round cut, 17.48×17.48mm, Red color)   Actual size of 0.25ct Emerald (emerald cut, 4.59×3.4mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 25ct Ruby (round cut, 17.48×17.48mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 0.25ct Emerald (emerald cut, 4.59×3.4mm) 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
 104% vs 21%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 25ct Ruby Round (17.48×17.48mm, Red) and 0.25ct Emerald Emerald (4.59×3.4mm, Green) 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.


25 Ct Ruby (Round) 0.25 Ct Emerald (Emerald)
17.48×17.48 mm vs 4.59×3.4 mm
239.98 mm²   14.51 mm²
Face-up size outline for 25ct Ruby (17.48×17.48mm, round cut)
Face-up size outline for 0.25ct Emerald (4.59×3.4mm, emerald cut)
25ct Ruby Round (17.48×17.48mm)
0.25ct Emerald Emerald (4.59×3.4mm)
Difference: 1554% (225.47 mm²)
25ct Ruby (Round, 17.48×17.48mm) has approx. 1554% more face-up area than 0.25ct Emerald (Emerald, 4.59×3.4mm). In other words, it's 16.54x larger.


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