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5ct Sapphire (Cabochon, 10×10mm, Dark Blue) vs 8ct Ruby (Cabochon, 13.68×9.12mm, Red)


Quick summary: When looked from above (face-up position), 8ct Ruby (13.68×9.12mm, cabochon cut) appears 25% larger than 5ct Sapphire (10×10mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

5ct Sapphire (cabochon cut)
vs
 8ct Ruby (cabochon cut)
dark blue
 
red
10×10 mm 13.68×9.12 mm
actual size
Actual size of 5ct Sapphire (cabochon cut, 10×10mm, Dark Blue color)   Actual size of 8ct Ruby (cabochon cut, 13.68×9.12mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Blue 5ct Sapphire (cabochon cut, 10×10mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 8ct Ruby (cabochon cut, 13.68×9.12mm) 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
 60% vs 54%
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Ring diameter: 16.9 mm
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Actual sizes of 5ct Sapphire Cabochon (10×10mm, Dark Blue) and 8ct Ruby Cabochon (13.68×9.12mm, 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

Sapphire and Ruby have the same specific gravity so their face-up size depends on the weight, shape and 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 Sapphire (Cabochon) 8 Ct Ruby (Cabochon)
10×10 mm vs 13.68×9.12 mm
82 mm²   102.3 mm²
Face-up size outline for 8ct Ruby (13.68×9.12mm, cabochon cut)
Face-up size outline for 5ct Sapphire (10×10mm, cabochon cut)
5ct Sapphire Cabochon (10×10mm)
8ct Ruby Cabochon (13.68×9.12mm)
Difference: 25% (20.3 mm²)
8ct Ruby (Cabochon, 13.68×9.12mm) has approx. 25% more face-up area than 5ct Sapphire (Cabochon, 10×10mm).


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