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0.75ct Fluorite (Marquise, 9.54×4.77mm, Bluish Green) vs 0.75ct Alexandrite (Marquise, 9.04×4.52mm, Bluish Green)


Quick summary: When looked from above (face-up position), 0.75ct Fluorite (9.54×4.77mm, marquise cut) appears 11% larger than 0.75ct Alexandrite (9.04×4.52mm, marquise cut). See below how they compare side-by-side on a ring and finger.

0.75ct Fluorite (marquise cut)
vs
 0.75ct Alexandrite (marquise cut)
bluish green
 
bluish green
9.54×4.77 mm 9.04×4.52 mm
actual size
Actual size of 0.75ct Fluorite (marquise cut, 9.54×4.77mm, Bluish Green color)   Actual size of 0.75ct Alexandrite (marquise cut, 9.04×4.52mm, Bluish Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 0.75ct Fluorite (marquise cut, 9.54×4.77mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 0.75ct Alexandrite (marquise cut, 9.04×4.52mm) 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
 29% vs 27%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.75ct Fluorite Marquise (9.54×4.77mm, Bluish Green) and 0.75ct Alexandrite Marquise (9.04×4.52mm, 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 Fluorite for a given carat weight, because it has higher specific gravity (3.73 vs. 3.18 - this means it's "heavier" compared to Fluorite 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.


0.75 Ct Fluorite (Marquise) 0.75 Ct Alexandrite (Marquise)
9.54×4.77 mm vs 9.04×4.52 mm
32.31 mm²   29.01 mm²
Face-up size outline for 0.75ct Fluorite (9.54×4.77mm, marquise cut)
Face-up size outline for 0.75ct Alexandrite (9.04×4.52mm, marquise cut)
0.75ct Fluorite Marquise (9.54×4.77mm)
0.75ct Alexandrite Marquise (9.04×4.52mm)
Difference: 11% (3.3 mm²)
0.75ct Fluorite (Marquise, 9.54×4.77mm) has approx. 11% more face-up area than 0.75ct Alexandrite (Marquise, 9.04×4.52mm).


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