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15ct Fluorite (Oval, 20.42×13.61mm, Bluish Green) vs 15ct Topaz (Oval, 19.71×13.14mm, Blue)


Quick summary: When looked from above (face-up position), 15ct Fluorite (20.42×13.61mm, oval cut) appears 7% larger than 15ct Topaz (19.71×13.14mm, oval cut). See below how they compare side-by-side on a ring and finger.

15ct Fluorite (oval cut)
vs
 15ct Topaz (oval cut)
bluish green
 
blue
20.42×13.61 mm 19.71×13.14 mm
actual size
Actual size of 15ct Fluorite (oval cut, 20.42×13.61mm, Bluish Green color)   Actual size of 15ct Topaz (oval cut, 19.71×13.14mm, 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 15ct Fluorite (oval cut, 20.42×13.61mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 15ct Topaz (oval cut, 19.71×13.14mm) 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
 81% vs 78%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 15ct Fluorite Oval (20.42×13.61mm, Bluish Green) and 15ct Topaz Oval (19.71×13.14mm, 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, Topaz will face-up smaller than Fluorite for a given carat weight, because it has higher specific gravity (3.53 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.


15 Ct Fluorite (Oval) 15 Ct Topaz (Oval)
20.42×13.61 mm vs 19.71×13.14 mm
227.89 mm²   212.37 mm²
Face-up size outline for 15ct Fluorite (20.42×13.61mm, oval cut)
Face-up size outline for 15ct Topaz (19.71×13.14mm, oval cut)
15ct Fluorite Oval (20.42×13.61mm)
15ct Topaz Oval (19.71×13.14mm)
Difference: 7% (15.52 mm²)
15ct Fluorite (Oval, 20.42×13.61mm) has approx. 7% more face-up area than 15ct Topaz (Oval, 19.71×13.14mm).


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