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1.37ct Sapphire (Round, 6.6×6.6mm, Dark Bluish Green) vs 3ct Ruby (Emerald, 9×7mm, Red)


Quick summary: When looked from above (face-up position), 3ct Ruby (9×7mm, emerald cut) appears 71% larger than 1.37ct Sapphire (6.6×6.6mm, round cut). See below how they compare side-by-side on a ring and finger.

1.37ct Sapphire (round cut)
vs
 3ct Ruby (emerald cut)
dark bluish green
 
red
6.6×6.6 mm 9×7 mm
actual size
Actual size of 1.37ct Sapphire (round cut, 6.6×6.6mm, Dark Bluish Green color)   Actual size of 3ct Ruby (emerald cut, 9×7mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Bluish Green 1.37ct Sapphire (round cut, 6.6×6.6mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 3ct Ruby (emerald cut, 9×7mm) 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
 40% vs 42%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.37ct Sapphire Round (6.6×6.6mm, Dark Bluish Green) and 3ct Ruby Emerald (9×7mm, 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.


1.37 Ct Sapphire (Round) 3 Ct Ruby (Emerald)
6.6×6.6 mm vs 9×7 mm
34.21 mm²   58.59 mm²
Face-up size outline for 3ct Ruby (9×7mm, emerald cut)
Face-up size outline for 1.37ct Sapphire (6.6×6.6mm, round cut)
1.37ct Sapphire Round (6.6×6.6mm)
3ct Ruby Emerald (9×7mm)
Difference: 71% (24.38 mm²)
3ct Ruby (Emerald, 9×7mm) has approx. 71% more face-up area than 1.37ct Sapphire (Round, 6.6×6.6mm).


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