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5ct Amethyst (Round, 11.73×11.73mm, Violet) vs 3ct Peridot (Pear, 12.72×7.66mm, Yellowish Green)


Quick summary: When looked from above (face-up position), 5ct Amethyst (11.73×11.73mm, round cut) appears 52% larger than 3ct Peridot (12.72×7.66mm, pear cut). See below how they compare side-by-side on a ring and finger.

5ct Amethyst (round cut)
vs
 3ct Peridot (pear cut)
violet
 
yellowish green
11.73×11.73 mm 12.72×7.66 mm
actual size
Actual size of 5ct Amethyst (round cut, 11.73×11.73mm, Violet color)   Actual size of 3ct Peridot (pear cut, 12.72×7.66mm, Yellowish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 5ct Amethyst (round cut, 11.73×11.73mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Yellowish Green 3ct Peridot (pear cut, 12.72×7.66mm) 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
 70% vs 46%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Amethyst Round (11.73×11.73mm, Violet) and 3ct Peridot Pear (12.72×7.66mm, 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 Amethyst for a given carat weight, because it has higher specific gravity (3.34 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.


5 Ct Amethyst (Round) 3 Ct Peridot (Pear)
11.73×11.73 mm vs 12.72×7.66 mm
108.07 mm²   71.13 mm²
Face-up size outline for 5ct Amethyst (11.73×11.73mm, round cut)
Face-up size outline for 3ct Peridot (12.72×7.66mm, pear cut)
5ct Amethyst Round (11.73×11.73mm)
3ct Peridot Pear (12.72×7.66mm)
Difference: 52% (36.94 mm²)
5ct Amethyst (Round, 11.73×11.73mm) has approx. 52% more face-up area than 3ct Peridot (Pear, 12.72×7.66mm).


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