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1.25ct Fluorite (Cushion, 6.44×6.44mm, Bluish Green) vs 1.25ct Alexandrite (Cushion, 6.1×6.1mm, Bluish Green)


Quick summary: When looked from above (face-up position), 1.25ct Fluorite (6.44×6.44mm, cushion cut) appears 11% larger than 1.25ct Alexandrite (6.1×6.1mm, cushion cut). See below how they compare side-by-side on a ring and finger.

1.25ct Fluorite (cushion cut)
vs
 1.25ct Alexandrite (cushion cut)
bluish green
 
bluish green
6.44×6.44 mm 6.1×6.1 mm
actual size
Actual size of 1.25ct Fluorite (cushion cut, 6.44×6.44mm, Bluish Green color)   Actual size of 1.25ct Alexandrite (cushion cut, 6.1×6.1mm, 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 1.25ct Fluorite (cushion cut, 6.44×6.44mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 1.25ct Alexandrite (cushion cut, 6.1×6.1mm) 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
 39% vs 37%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.25ct Fluorite Cushion (6.44×6.44mm, Bluish Green) and 1.25ct Alexandrite Cushion (6.1×6.1mm, 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.


1.25 Ct Fluorite (Cushion) 1.25 Ct Alexandrite (Cushion)
6.44×6.44 mm vs 6.1×6.1 mm
37.33 mm²   33.49 mm²
Face-up size outline for 1.25ct Fluorite (6.44×6.44mm, cushion cut)
Face-up size outline for 1.25ct Alexandrite (6.1×6.1mm, cushion cut)
1.25ct Fluorite Cushion (6.44×6.44mm)
1.25ct Alexandrite Cushion (6.1×6.1mm)
Difference: 11% (3.84 mm²)
1.25ct Fluorite (Cushion, 6.44×6.44mm) has approx. 11% more face-up area than 1.25ct Alexandrite (Cushion, 6.1×6.1mm).


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