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18ct Sapphire (Baguette, 18.17×12.11mm, Blue) vs 18ct Fluorite (Baguette, 19.61×13.07mm, Bluish Green)


Quick summary: When looked from above (face-up position), 18ct Fluorite (19.61×13.07mm, baguette cut) appears 16% larger than 18ct Sapphire (18.17×12.11mm, baguette cut). See below how they compare side-by-side on a ring and finger.

18ct Sapphire (baguette cut)
vs
 18ct Fluorite (baguette cut)
blue
 
bluish green
18.17×12.11 mm 19.61×13.07 mm
actual size
Actual size of 18ct Sapphire (baguette cut, 18.17×12.11mm, Blue color)   Actual size of 18ct Fluorite (baguette cut, 19.61×13.07mm, Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 18ct Sapphire (baguette cut, 18.17×12.11mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 18ct Fluorite (baguette cut, 19.61×13.07mm) 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
 72% vs 78%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 18ct Sapphire Baguette (18.17×12.11mm, Blue) and 18ct Fluorite Baguette (19.61×13.07mm, 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, 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.


18 Ct Sapphire (Baguette) 18 Ct Fluorite (Baguette)
18.17×12.11 mm vs 19.61×13.07 mm
220.04 mm²   256.3 mm²
Face-up size outline for 18ct Fluorite (19.61×13.07mm, baguette cut)
Face-up size outline for 18ct Sapphire (18.17×12.11mm, baguette cut)
18ct Sapphire Baguette (18.17×12.11mm)
18ct Fluorite Baguette (19.61×13.07mm)
Difference: 16% (36.26 mm²)
18ct Fluorite (Baguette, 19.61×13.07mm) has approx. 16% more face-up area than 18ct Sapphire (Baguette, 18.17×12.11mm).


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