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3ct Spinel (Emerald, 9.54×7.07mm, Red) vs 3ct Alexandrite (Emerald, 9.42×6.98mm, Bluish Green)


Quick summary: When looked from above (face-up position), 3ct Spinel (9.54×7.07mm, emerald cut) appears 3% larger than 3ct Alexandrite (9.42×6.98mm, emerald cut). See below how they compare side-by-side on a ring and finger.

3ct Spinel (emerald cut)
vs
 3ct Alexandrite (emerald cut)
red
 
bluish green
9.54×7.07 mm 9.42×6.98 mm
actual size
Actual size of 3ct Spinel (emerald cut, 9.54×7.07mm, Red color)   Actual size of 3ct Alexandrite (emerald cut, 9.42×6.98mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 3ct Spinel (emerald cut, 9.54×7.07mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 3ct Alexandrite (emerald cut, 9.42×6.98mm) 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
 42% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3ct Spinel Emerald (9.54×7.07mm, Red) and 3ct Alexandrite Emerald (9.42×6.98mm, 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 Spinel for a given carat weight, because it has higher specific gravity (3.73 vs. 3.6 - this means it's "heavier" compared to Spinel 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.


3 Ct Spinel (Emerald) 3 Ct Alexandrite (Emerald)
9.54×7.07 mm vs 9.42×6.98 mm
62.73 mm²   61.15 mm²
Face-up size outline for 3ct Spinel (9.54×7.07mm, emerald cut)
Face-up size outline for 3ct Alexandrite (9.42×6.98mm, emerald cut)
3ct Spinel Emerald (9.54×7.07mm)
3ct Alexandrite Emerald (9.42×6.98mm)
Difference: 3% (1.58 mm²)
3ct Spinel (Emerald, 9.54×7.07mm) has approx. 3% more face-up area than 3ct Alexandrite (Emerald, 9.42×6.98mm).


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