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18ct Ruby (Round, 15.67×15.67mm, Red) vs 5ct Ruby (Round, 10.22×10.22mm, Red)


Quick summary: When looked from above (face-up position), 18ct Ruby (15.67×15.67mm, round cut) appears 2.4 times larger than 5ct Ruby (10.22×10.22mm, round cut). See below how they compare side-by-side on a ring and finger.

18ct Ruby (round cut)
vs
 5ct Ruby (round cut)
red
 
red
15.67×15.67 mm 10.22×10.22 mm
actual size
Actual size of 18ct Ruby (round cut, 15.67×15.67mm, Red color)   Actual size of 5ct Ruby (round cut, 10.22×10.22mm, Red color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 18ct Ruby (round cut, 15.67×15.67mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 5ct Ruby (round cut, 10.22×10.22mm) 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
 93% vs 61%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 18ct Ruby Round (15.67×15.67mm, Red) and 5ct Ruby Round (10.22×10.22mm, 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

The face-up size depends on the shape of the gem, its weight and 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.


18 Ct Ruby (Round) 5 Ct Ruby (Round)
15.67×15.67 mm vs 10.22×10.22 mm
192.85 mm²   82.03 mm²
Face-up size outline for 18ct Ruby (15.67×15.67mm, round cut)
Face-up size outline for 5ct Ruby (10.22×10.22mm, round cut)
18ct Ruby Round (15.67×15.67mm)
5ct Ruby Round (10.22×10.22mm)
Difference: 135% (110.82 mm²)
18ct Ruby (Round, 15.67×15.67mm) has approx. 135% more face-up area than 5ct Ruby (Round, 10.22×10.22mm). In other words, it's 2.35x larger.


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