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9ct Diamond (Round, 13.52×13.52mm, White) vs 1.34ct Ruby (Oval, 8.34×5.56mm, Red)


Quick summary: When looked from above (face-up position), 9ct Diamond (13.52×13.52mm, round cut) appears 3.8 times larger than 1.34ct Ruby (8.34×5.56mm, oval cut). See below how they compare side-by-side on a ring and finger.

9ct Diamond (round cut)
vs
 1.34ct Ruby (oval cut)
white
 
red
13.52×13.52 mm 8.34×5.56 mm
actual size
Actual size of 9ct Diamond (round cut, 13.52×13.52mm, White color)   Actual size of 1.34ct Ruby (oval cut, 8.34×5.56mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 9ct Diamond (round cut, 13.52×13.52mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1.34ct Ruby (oval cut, 8.34×5.56mm) 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
 80% vs 33%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 9ct Diamond Round (13.52×13.52mm, White) and 1.34ct Ruby Oval (8.34×5.56mm, 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 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.


9 Ct Diamond (Round) 1.34 Ct Ruby (Oval)
13.52×13.52 mm vs 8.34×5.56 mm
143.56 mm²   38.02 mm²
Face-up size outline for 9ct Diamond (13.52×13.52mm, round cut)
Face-up size outline for 1.34ct Ruby (8.34×5.56mm, oval cut)
9ct Diamond Round (13.52×13.52mm)
1.34ct Ruby Oval (8.34×5.56mm)
Difference: 278% (105.54 mm²)
9ct Diamond (Round, 13.52×13.52mm) has approx. 278% more face-up area than 1.34ct Ruby (Oval, 8.34×5.56mm). In other words, it's 3.78x larger.


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