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4ct Sapphire (Round, 9.49×9.49mm, Blue) vs 2ct Ruby (Round, 7.53×7.53mm, Red)


Quick summary: When looked from above (face-up position), 4ct Sapphire (9.49×9.49mm, round cut) appears 59% larger than 2ct Ruby (7.53×7.53mm, round cut). See below how they compare side-by-side on a ring and finger.

4ct Sapphire (round cut)
vs
 2ct Ruby (round cut)
blue
 
red
9.49×9.49 mm 7.53×7.53 mm
actual size
Actual size of 4ct Sapphire (round cut, 9.49×9.49mm, Blue color)   Actual size of 2ct Ruby (round cut, 7.53×7.53mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4ct Sapphire (round cut, 9.49×9.49mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 2ct Ruby (round cut, 7.53×7.53mm) 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
 57% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Sapphire Round (9.49×9.49mm, Blue) and 2ct Ruby Round (7.53×7.53mm, 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.


4 Ct Sapphire (Round) 2 Ct Ruby (Round)
9.49×9.49 mm vs 7.53×7.53 mm
70.73 mm²   44.53 mm²
Face-up size outline for 4ct Sapphire (9.49×9.49mm, round cut)
Face-up size outline for 2ct Ruby (7.53×7.53mm, round cut)
4ct Sapphire Round (9.49×9.49mm)
2ct Ruby Round (7.53×7.53mm)
Difference: 59% (26.2 mm²)
4ct Sapphire (Round, 9.49×9.49mm) has approx. 59% more face-up area than 2ct Ruby (Round, 7.53×7.53mm).


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