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0.5ct Benitoite (Round, 4.89×4.89mm, Blue) vs 0.5ct Ruby (Round, 4.75×4.75mm, Red)


Quick summary: When looked from above (face-up position), 0.5ct Benitoite (4.89×4.89mm, round cut) appears 6% larger than 0.5ct Ruby (4.75×4.75mm, round cut). See below how they compare side-by-side on a ring and finger.

0.5ct Benitoite (round cut)
vs
 0.5ct Ruby (round cut)
blue
 
red
4.89×4.89 mm 4.75×4.75 mm
actual size
Actual size of 0.5ct Benitoite (round cut, 4.89×4.89mm, Blue color)   Actual size of 0.5ct Ruby (round cut, 4.75×4.75mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.5ct Benitoite (round cut, 4.89×4.89mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.5ct Ruby (round cut, 4.75×4.75mm) 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
 29% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.5ct Benitoite Round (4.89×4.89mm, Blue) and 0.5ct Ruby Round (4.75×4.75mm, 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 Benitoite for a given carat weight, because it has higher specific gravity (4 vs. 3.65 - this means it's "heavier" compared to Benitoite 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.


0.5 Ct Benitoite (Round) 0.5 Ct Ruby (Round)
4.89×4.89 mm vs 4.75×4.75 mm
18.78 mm²   17.72 mm²
Face-up size outline for 0.5ct Benitoite (4.89×4.89mm, round cut)
Face-up size outline for 0.5ct Ruby (4.75×4.75mm, round cut)
0.5ct Benitoite Round (4.89×4.89mm)
0.5ct Ruby Round (4.75×4.75mm)
Difference: 6% (1.06 mm²)
0.5ct Benitoite (Round, 4.89×4.89mm) has approx. 6% more face-up area than 0.5ct Ruby (Round, 4.75×4.75mm).


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