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10ct Benitoite (Oval, 16.8×11.2mm, Blue) vs 1ct Alexandrite (Emerald, 6.55×4.85mm, Bluish Green)


Quick summary: When looked from above (face-up position), 10ct Benitoite (16.8×11.2mm, oval cut) appears 5.2 times larger than 1ct Alexandrite (6.55×4.85mm, emerald cut). See below how they compare side-by-side on a ring and finger.

10ct Benitoite (oval cut)
vs
 1ct Alexandrite (emerald cut)
blue
 
bluish green
16.8×11.2 mm 6.55×4.85 mm
actual size
Actual size of 10ct Benitoite (oval cut, 16.8×11.2mm, Blue color)   Actual size of 1ct Alexandrite (emerald cut, 6.55×4.85mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 10ct Benitoite (oval cut, 16.8×11.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 1ct Alexandrite (emerald cut, 6.55×4.85mm) 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
 67% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 10ct Benitoite Oval (16.8×11.2mm, Blue) and 1ct Alexandrite Emerald (6.55×4.85mm, 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 slightly smaller than Benitoite for a given carat weight, because it has higher specific gravity (3.73 vs. 3.65 - this means it's "slightly heavier" compared to Benitoite 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.


10 Ct Benitoite (Oval) 1 Ct Alexandrite (Emerald)
16.8×11.2 mm vs 6.55×4.85 mm
154.29 mm²   29.54 mm²
Face-up size outline for 10ct Benitoite (16.8×11.2mm, oval cut)
Face-up size outline for 1ct Alexandrite (6.55×4.85mm, emerald cut)
10ct Benitoite Oval (16.8×11.2mm)
1ct Alexandrite Emerald (6.55×4.85mm)
Difference: 422% (124.75 mm²)
10ct Benitoite (Oval, 16.8×11.2mm) has approx. 422% more face-up area than 1ct Alexandrite (Emerald, 6.55×4.85mm). In other words, it's 5.22x larger.


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