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12.5ct Ruby (Round, 13.87×13.87mm, Red) vs 12ct Sapphire (Round, 15×13.5mm, Orange)


Quick summary: When looked from above (face-up position), 12ct Sapphire (15×13.5mm, round cut) appears 5% larger than 12.5ct Ruby (13.87×13.87mm, round cut). See below how they compare side-by-side on a ring and finger.

12.5ct Ruby (round cut)
vs
 12ct Sapphire (round cut)
red
 
orange
13.87×13.87 mm 15×13.5 mm
actual size
Actual size of 12.5ct Ruby (round cut, 13.87×13.87mm, Red color)   Actual size of 12ct Sapphire (round cut, 15×13.5mm, Orange color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 12.5ct Ruby (round cut, 13.87×13.87mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Orange 12ct Sapphire (round cut, 15×13.5mm) 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
 83% vs 80%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 12.5ct Ruby Round (13.87×13.87mm, Red) and 12ct Sapphire Round (15×13.5mm, Orange) 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

Ruby and Sapphire 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.


12.5 Ct Ruby (Round) 12 Ct Sapphire (Round)
13.87×13.87 mm vs 15×13.5 mm
151.09 mm²   159.04 mm²
Face-up size outline for 12ct Sapphire (15×13.5mm, round cut)
Face-up size outline for 12.5ct Ruby (13.87×13.87mm, round cut)
12.5ct Ruby Round (13.87×13.87mm)
12ct Sapphire Round (15×13.5mm)
Difference: 5% (7.95 mm²)
12ct Sapphire (Round, 15×13.5mm) has approx. 5% more face-up area than 12.5ct Ruby (Round, 13.87×13.87mm).


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