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18ct Emerald (Emerald, 19.08×14.13mm, Green) vs 1ct Peridot (Oval, 8.03×5.35mm, Yellowish Green)


Quick summary: When looked from above (face-up position), 18ct Emerald (19.08×14.13mm, emerald cut) appears 7.1 times larger than 1ct Peridot (8.03×5.35mm, oval cut). See below how they compare side-by-side on a ring and finger.

18ct Emerald (emerald cut)
vs
 1ct Peridot (oval cut)
green
 
yellowish green
19.08×14.13 mm 8.03×5.35 mm
actual size
Actual size of 18ct Emerald (emerald cut, 19.08×14.13mm, Green color)   Actual size of 1ct Peridot (oval cut, 8.03×5.35mm, Yellowish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 18ct Emerald (emerald cut, 19.08×14.13mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Yellowish Green 1ct Peridot (oval cut, 8.03×5.35mm) 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
 84% vs 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Emerald Emerald (19.08×14.13mm, Green) and 1ct Peridot Oval (8.03×5.35mm, Yellowish Green) 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, Peridot will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.34 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.


18 Ct Emerald (Emerald) 1 Ct Peridot (Oval)
19.08×14.13 mm vs 8.03×5.35 mm
250.73 mm²   35.23 mm²
Face-up size outline for 18ct Emerald (19.08×14.13mm, emerald cut)
Face-up size outline for 1ct Peridot (8.03×5.35mm, oval cut)
18ct Emerald Emerald (19.08×14.13mm)
1ct Peridot Oval (8.03×5.35mm)
Difference: 612% (215.5 mm²)
18ct Emerald (Emerald, 19.08×14.13mm) has approx. 612% more face-up area than 1ct Peridot (Oval, 8.03×5.35mm). In other words, it's 7.12x larger.


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