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4.5ct Ruby (Round, 9.87×9.87mm, Red) vs 4.5ct Pyrope (Round, 10.06×10.06mm, Red)


Quick summary: When looked from above (face-up position), 4.5ct Pyrope (10.06×10.06mm, round cut) appears 4% larger than 4.5ct Ruby (9.87×9.87mm, round cut). See below how they compare side-by-side on a ring and finger.

4.5ct Ruby (round cut)
vs
 4.5ct Pyrope (round cut)
red
 
red
9.87×9.87 mm 10.06×10.06 mm
actual size
Actual size of 4.5ct Ruby (round cut, 9.87×9.87mm, Red color)   Actual size of 4.5ct Pyrope (round cut, 10.06×10.06mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 4.5ct Ruby (round cut, 9.87×9.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 4.5ct Pyrope (round cut, 10.06×10.06mm) 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
 59% vs 60%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4.5ct Ruby Round (9.87×9.87mm, Red) and 4.5ct Pyrope Round (10.06×10.06mm, 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 Pyrope for a given carat weight, because it has higher specific gravity (4 vs. 3.78 - this means it's "heavier" compared to Pyrope 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.


4.5 Ct Ruby (Round) 4.5 Ct Pyrope (Round)
9.87×9.87 mm vs 10.06×10.06 mm
76.51 mm²   79.49 mm²
Face-up size outline for 4.5ct Pyrope (10.06×10.06mm, round cut)
Face-up size outline for 4.5ct Ruby (9.87×9.87mm, round cut)
4.5ct Ruby Round (9.87×9.87mm)
4.5ct Pyrope Round (10.06×10.06mm)
Difference: 4% (2.98 mm²)
4.5ct Pyrope (Round, 10.06×10.06mm) has approx. 4% more face-up area than 4.5ct Ruby (Round, 9.87×9.87mm).


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