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4.5ct Fluorite (Cabochon, 12.2×8.13mm, Bluish Green) vs 4.5ct Aquamarine (Cabochon, 12.86×8.57mm, Light Blue)


Quick summary: When looked from above (face-up position), 4.5ct Aquamarine (12.86×8.57mm, cabochon cut) appears 11% larger than 4.5ct Fluorite (12.2×8.13mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

4.5ct Fluorite (cabochon cut)
vs
 4.5ct Aquamarine (cabochon cut)
bluish green
 
light blue
12.2×8.13 mm 12.86×8.57 mm
actual size
Actual size of 4.5ct Fluorite (cabochon cut, 12.2×8.13mm, Bluish Green color)   Actual size of 4.5ct Aquamarine (cabochon cut, 12.86×8.57mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 4.5ct Fluorite (cabochon cut, 12.2×8.13mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 4.5ct Aquamarine (cabochon cut, 12.86×8.57mm) 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
 49% vs 51%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 4.5ct Fluorite Cabochon (12.2×8.13mm, Bluish Green) and 4.5ct Aquamarine Cabochon (12.86×8.57mm, Light Blue) 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, Fluorite will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.18 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.


4.5 Ct Fluorite (Cabochon) 4.5 Ct Aquamarine (Cabochon)
12.2×8.13 mm vs 12.86×8.57 mm
81.33 mm²   90.37 mm²
Face-up size outline for 4.5ct Aquamarine (12.86×8.57mm, cabochon cut)
Face-up size outline for 4.5ct Fluorite (12.2×8.13mm, cabochon cut)
4.5ct Fluorite Cabochon (12.2×8.13mm)
4.5ct Aquamarine Cabochon (12.86×8.57mm)
Difference: 11% (9.04 mm²)
4.5ct Aquamarine (Cabochon, 12.86×8.57mm) has approx. 11% more face-up area than 4.5ct Fluorite (Cabochon, 12.2×8.13mm).


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