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5ct Ruby (Round, 10.22×10.22mm, Red) vs 5ct Diamond (Round, 11.11×11.11mm, White)


Quick summary: When looked from above (face-up position), 5ct Diamond (11.11×11.11mm, round cut) appears 18% larger than 5ct Ruby (10.22×10.22mm, round cut). See below how they compare side-by-side on a ring and finger.

5ct Ruby (round cut)
vs
 5ct Diamond (round cut)
red
 
white
10.22×10.22 mm 11.11×11.11 mm
actual size
Actual size of 5ct Ruby (round cut, 10.22×10.22mm, Red color)   Actual size of 5ct Diamond (round cut, 11.11×11.11mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 5ct Ruby (round cut, 10.22×10.22mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 5ct Diamond (round cut, 11.11×11.11mm) 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
 61% vs 66%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Ruby Round (10.22×10.22mm, Red) and 5ct Diamond Round (11.11×11.11mm, White) 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 Diamond for a given carat weight, because it has higher specific gravity (4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


5 Ct Ruby (Round) 5 Ct Diamond (Round)
10.22×10.22 mm vs 11.11×11.11 mm
82.03 mm²   96.94 mm²
Face-up size outline for 5ct Diamond (11.11×11.11mm, round cut)
Face-up size outline for 5ct Ruby (10.22×10.22mm, round cut)
5ct Ruby Round (10.22×10.22mm)
5ct Diamond Round (11.11×11.11mm)
Difference: 18% (14.91 mm²)
5ct Diamond (Round, 11.11×11.11mm) has approx. 18% more face-up area than 5ct Ruby (Round, 10.22×10.22mm).


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