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12ct Fluorite (Cabochon, 16.92×11.28mm, Bluish Green) vs 12ct Topaz (Cabochon, 16.34×10.89mm, Blue)


Quick summary: When looked from above (face-up position), 12ct Fluorite (16.92×11.28mm, cabochon cut) appears 7% larger than 12ct Topaz (16.34×10.89mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

12ct Fluorite (cabochon cut)
vs
 12ct Topaz (cabochon cut)
bluish green
 
blue
16.92×11.28 mm 16.34×10.89 mm
actual size
Actual size of 12ct Fluorite (cabochon cut, 16.92×11.28mm, Bluish Green color)   Actual size of 12ct Topaz (cabochon cut, 16.34×10.89mm, 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 (cabochon cut, 16.92×11.28mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 12ct Topaz (cabochon cut, 16.34×10.89mm) 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
 67% vs 65%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 12ct Fluorite Cabochon (16.92×11.28mm, Bluish Green) and 12ct Topaz Cabochon (16.34×10.89mm, 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.


12 Ct Fluorite (Cabochon) 12 Ct Topaz (Cabochon)
16.92×11.28 mm vs 16.34×10.89 mm
156.5 mm²   145.91 mm²
Face-up size outline for 12ct Fluorite (16.92×11.28mm, cabochon cut)
Face-up size outline for 12ct Topaz (16.34×10.89mm, cabochon cut)
12ct Fluorite Cabochon (16.92×11.28mm)
12ct Topaz Cabochon (16.34×10.89mm)
Difference: 7% (10.59 mm²)
12ct Fluorite (Cabochon, 16.92×11.28mm) has approx. 7% more face-up area than 12ct Topaz (Cabochon, 16.34×10.89mm).


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