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20ct Amethyst (Pear, 26.48×15.95mm, Violet) vs 20ct Alexandrite (Pear, 23.62×14.23mm, Bluish Green)


Quick summary: When looked from above (face-up position), 20ct Amethyst (26.48×15.95mm, pear cut) appears 26% larger than 20ct Alexandrite (23.62×14.23mm, pear cut). See below how they compare side-by-side on a ring and finger.

20ct Amethyst (pear cut)
vs
 20ct Alexandrite (pear cut)
violet
 
bluish green
26.48×15.95 mm 23.62×14.23 mm
actual size
Actual size of 20ct Amethyst (pear cut, 26.48×15.95mm, Violet color)   Actual size of 20ct Alexandrite (pear cut, 23.62×14.23mm, 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 20ct Amethyst (pear cut, 26.48×15.95mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 20ct Alexandrite (pear cut, 23.62×14.23mm) 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
 95% vs 85%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 20ct Amethyst Pear (26.48×15.95mm, Violet) and 20ct Alexandrite Pear (23.62×14.23mm, 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.


20 Ct Amethyst (Pear) 20 Ct Alexandrite (Pear)
26.48×15.95 mm vs 23.62×14.23 mm
308.32 mm²   245.36 mm²
Face-up size outline for 20ct Amethyst (26.48×15.95mm, pear cut)
Face-up size outline for 20ct Alexandrite (23.62×14.23mm, pear cut)
20ct Amethyst Pear (26.48×15.95mm)
20ct Alexandrite Pear (23.62×14.23mm)
Difference: 26% (62.96 mm²)
20ct Amethyst (Pear, 26.48×15.95mm) has approx. 26% more face-up area than 20ct Alexandrite (Pear, 23.62×14.23mm).


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