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11.29ct Peridot (Marquise, 23.5×11.75mm, Yellowish Green) vs 8.01ct Amethyst (Oval, 17.36×11.57mm, Violet)


Quick summary: When looked from above (face-up position), 11.29ct Peridot (23.5×11.75mm, marquise cut) appears 19% larger than 8.01ct Amethyst (17.36×11.57mm, oval cut). See below how they compare side-by-side on a ring and finger.

11.29ct Peridot (marquise cut)
vs
 8.01ct Amethyst (oval cut)
yellowish green
 
violet
23.5×11.75 mm 17.36×11.57 mm
actual size
Actual size of 11.29ct Peridot (marquise cut, 23.5×11.75mm, Yellowish Green color)   Actual size of 8.01ct Amethyst (oval cut, 17.36×11.57mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Yellowish Green 11.29ct Peridot (marquise cut, 23.5×11.75mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 8.01ct Amethyst (oval cut, 17.36×11.57mm) 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 69%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 11.29ct Peridot Marquise (23.5×11.75mm, Yellowish Green) and 8.01ct Amethyst Oval (17.36×11.57mm, Violet) 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.


11.29 Ct Peridot (Marquise) 8.01 Ct Amethyst (Oval)
23.5×11.75 mm vs 17.36×11.57 mm
196.05 mm²   164.7 mm²
Face-up size outline for 11.29ct Peridot (23.5×11.75mm, marquise cut)
Face-up size outline for 8.01ct Amethyst (17.36×11.57mm, oval cut)
11.29ct Peridot Marquise (23.5×11.75mm)
8.01ct Amethyst Oval (17.36×11.57mm)
Difference: 19% (31.35 mm²)
11.29ct Peridot (Marquise, 23.5×11.75mm) has approx. 19% more face-up area than 8.01ct Amethyst (Oval, 17.36×11.57mm).


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