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13ct Sapphire (Radiant, 12.95×12.95mm, Blue) vs 13ct Fluorite (Radiant, 13.98×13.98mm, Bluish Green)


Quick summary: When looked from above (face-up position), 13ct Fluorite (13.98×13.98mm, radiant cut) appears 17% larger than 13ct Sapphire (12.95×12.95mm, radiant cut). See below how they compare side-by-side on a ring and finger.

13ct Sapphire (radiant cut)
vs
 13ct Fluorite (radiant cut)
blue
 
bluish green
12.95×12.95 mm 13.98×13.98 mm
actual size
Actual size of 13ct Sapphire (radiant cut, 12.95×12.95mm, Blue color)   Actual size of 13ct Fluorite (radiant cut, 13.98×13.98mm, 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 13ct Sapphire (radiant cut, 12.95×12.95mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Bluish Green 13ct Fluorite (radiant cut, 13.98×13.98mm) 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
 77% vs 83%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 13ct Sapphire Radiant (12.95×12.95mm, Blue) and 13ct Fluorite Radiant (13.98×13.98mm, 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.


13 Ct Sapphire (Radiant) 13 Ct Fluorite (Radiant)
12.95×12.95 mm vs 13.98×13.98 mm
159.32 mm²   185.67 mm²
Face-up size outline for 13ct Fluorite (13.98×13.98mm, radiant cut)
Face-up size outline for 13ct Sapphire (12.95×12.95mm, radiant cut)
13ct Sapphire Radiant (12.95×12.95mm)
13ct Fluorite Radiant (13.98×13.98mm)
Difference: 17% (26.35 mm²)
13ct Fluorite (Radiant, 13.98×13.98mm) has approx. 17% more face-up area than 13ct Sapphire (Radiant, 12.95×12.95mm).


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