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12ct Fluorite (Oval, 18.69×12.46mm, Bluish Green) vs 5ct Sapphire (Oval, 12.93×8.62mm, Blue)


Quick summary: When looked from above (face-up position), 12ct Fluorite (18.69×12.46mm, oval cut) appears 2.1 times larger than 5ct Sapphire (12.93×8.62mm, oval cut). See below how they compare side-by-side on a ring and finger.

12ct Fluorite (oval cut)
vs
 5ct Sapphire (oval cut)
bluish green
 
blue
18.69×12.46 mm 12.93×8.62 mm
actual size
Actual size of 12ct Fluorite (oval cut, 18.69×12.46mm, Bluish Green color)   Actual size of 5ct Sapphire (oval cut, 12.93×8.62mm, 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 12ct Fluorite (oval cut, 18.69×12.46mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 5ct Sapphire (oval cut, 12.93×8.62mm) 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
 74% vs 52%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 12ct Fluorite Oval (18.69×12.46mm, Bluish Green) and 5ct Sapphire Oval (12.93×8.62mm, 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, Sapphire will face-up smaller than Fluorite for a given carat weight, because it has higher specific gravity (4 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.


12 Ct Fluorite (Oval) 5 Ct Sapphire (Oval)
18.69×12.46 mm vs 12.93×8.62 mm
190.96 mm²   91.39 mm²
Face-up size outline for 12ct Fluorite (18.69×12.46mm, oval cut)
Face-up size outline for 5ct Sapphire (12.93×8.62mm, oval cut)
12ct Fluorite Oval (18.69×12.46mm)
5ct Sapphire Oval (12.93×8.62mm)
Difference: 109% (99.57 mm²)
12ct Fluorite (Oval, 18.69×12.46mm) has approx. 109% more face-up area than 5ct Sapphire (Oval, 12.93×8.62mm). In other words, it's 2.09x larger.


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