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30ct Emerald (Pear, 29.42×17.72mm, Green) vs 12ct Ruby (Pear, 19.01×11.45mm, Red)


Quick summary: When looked from above (face-up position), 30ct Emerald (29.42×17.72mm, pear cut) appears 2.4 times larger than 12ct Ruby (19.01×11.45mm, pear cut). See below how they compare side-by-side on a ring and finger.

30ct Emerald (pear cut)
vs
 12ct Ruby (pear cut)
green
 
red
29.42×17.72 mm 19.01×11.45 mm
actual size
Actual size of 30ct Emerald (pear cut, 29.42×17.72mm, Green color)   Actual size of 12ct Ruby (pear cut, 19.01×11.45mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 30ct Emerald (pear cut, 29.42×17.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 12ct Ruby (pear cut, 19.01×11.45mm) 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
 105% vs 68%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 30ct Emerald Pear (29.42×17.72mm, Green) and 12ct Ruby Pear (19.01×11.45mm, 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

All things being equal, Ruby will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (4 vs. 2.72 - this means it's "heavier" compared to Emerald 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.


30 Ct Emerald (Pear) 12 Ct Ruby (Pear)
29.42×17.72 mm vs 19.01×11.45 mm
380.57 mm²   158.9 mm²
Face-up size outline for 30ct Emerald (29.42×17.72mm, pear cut)
Face-up size outline for 12ct Ruby (19.01×11.45mm, pear cut)
30ct Emerald Pear (29.42×17.72mm)
12ct Ruby Pear (19.01×11.45mm)
Difference: 140% (221.67 mm²)
30ct Emerald (Pear, 29.42×17.72mm) has approx. 140% more face-up area than 12ct Ruby (Pear, 19.01×11.45mm). In other words, it's 2.4x larger.


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