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11ct Amethyst (Oval, 19.56×13.04mm, Violet) vs 11ct Alexandrite (Oval, 17.46×11.64mm, Bluish Green)


Quick summary: When looked from above (face-up position), 11ct Amethyst (19.56×13.04mm, oval cut) appears 26% larger than 11ct Alexandrite (17.46×11.64mm, oval cut). See below how they compare side-by-side on a ring and finger.

11ct Amethyst (oval cut)
vs
 11ct Alexandrite (oval cut)
violet
 
bluish green
19.56×13.04 mm 17.46×11.64 mm
actual size
Actual size of 11ct Amethyst (oval cut, 19.56×13.04mm, Violet color)   Actual size of 11ct Alexandrite (oval cut, 17.46×11.64mm, Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 11ct Amethyst (oval cut, 19.56×13.04mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 11ct Alexandrite (oval cut, 17.46×11.64mm) 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
 78% vs 69%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 11ct Amethyst Oval (19.56×13.04mm, Violet) and 11ct Alexandrite Oval (17.46×11.64mm, Bluish 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, Alexandrite will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (3.73 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 Ct Amethyst (Oval) 11 Ct Alexandrite (Oval)
19.56×13.04 mm vs 17.46×11.64 mm
209.15 mm²   166.65 mm²
Face-up size outline for 11ct Amethyst (19.56×13.04mm, oval cut)
Face-up size outline for 11ct Alexandrite (17.46×11.64mm, oval cut)
11ct Amethyst Oval (19.56×13.04mm)
11ct Alexandrite Oval (17.46×11.64mm)
Difference: 26% (42.5 mm²)
11ct Amethyst (Oval, 19.56×13.04mm) has approx. 26% more face-up area than 11ct Alexandrite (Oval, 17.46×11.64mm).


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