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15ct Ruby (Cabochon, 16.88×11.25mm, Red) vs 15ct Andesine (Cabochon, 19.31×12.87mm, Orange)


Quick summary: When looked from above (face-up position), 15ct Andesine (19.31×12.87mm, cabochon cut) appears 31% larger than 15ct Ruby (16.88×11.25mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

15ct Ruby (cabochon cut)
vs
 15ct Andesine (cabochon cut)
red
 
orange
16.88×11.25 mm 19.31×12.87 mm
actual size
Actual size of 15ct Ruby (cabochon cut, 16.88×11.25mm, Red color)   Actual size of 15ct Andesine (cabochon cut, 19.31×12.87mm, Orange color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 15ct Ruby (cabochon cut, 16.88×11.25mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Orange 15ct Andesine (cabochon cut, 19.31×12.87mm) 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
 67% vs 77%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 15ct Ruby Cabochon (16.88×11.25mm, Red) and 15ct Andesine Cabochon (19.31×12.87mm, 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

All things being equal, Ruby will face-up smaller than Andesine for a given carat weight, because it has higher specific gravity (4 vs. 2.67 - this means it's "heavier" compared to Andesine of the same size). Face-up size also depends heavily on 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.


15 Ct Ruby (Cabochon) 15 Ct Andesine (Cabochon)
16.88×11.25 mm vs 19.31×12.87 mm
155.72 mm²   203.79 mm²
Face-up size outline for 15ct Andesine (19.31×12.87mm, cabochon cut)
Face-up size outline for 15ct Ruby (16.88×11.25mm, cabochon cut)
15ct Ruby Cabochon (16.88×11.25mm)
15ct Andesine Cabochon (19.31×12.87mm)
Difference: 31% (48.07 mm²)
15ct Andesine (Cabochon, 19.31×12.87mm) has approx. 31% more face-up area than 15ct Ruby (Cabochon, 16.88×11.25mm).


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