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5ct Fluorite (Marquise, 18.22×9.11mm, Bluish Green) vs 5.5ct Diamond (Marquise, 18.34×9.17mm, Light Gray)


Quick summary: When looked from above (face-up position), 5.5ct Colored Diamond (18.34×9.17mm, marquise cut) appears 1% larger than 5ct Fluorite (18.22×9.11mm, marquise cut). See below how they compare side-by-side on a ring and finger.

5ct Fluorite (marquise cut)
vs
 5.5ct Diamond (marquise cut)
bluish green
 
light gray
18.22×9.11 mm 18.34×9.17 mm
actual size
Actual size of 5ct Fluorite (marquise cut, 18.22×9.11mm, Bluish Green color)   Actual size of 5.5ct Diamond (marquise cut, 18.34×9.17mm, Light Gray color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Bluish Green 5ct Fluorite (marquise cut, 18.22×9.11mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Gray 5.5ct Diamond (marquise cut, 18.34×9.17mm) 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
 54% vs 55%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 5ct Fluorite Marquise (18.22×9.11mm, Bluish Green) and 5.5ct Diamond Marquise (18.34×9.17mm, Light Gray) 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, Diamond will face-up smaller than Fluorite for a given carat weight, because it has higher specific gravity (3.52 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.


5 Ct Fluorite (Marquise) 5.5 Ct Colored Diamond (Marquise)
18.22×9.11 mm vs 18.34×9.17 mm
117.85 mm²   119.41 mm²
Face-up size outline for 5.5ct Diamond (18.34×9.17mm, marquise cut)
Face-up size outline for 5ct Fluorite (18.22×9.11mm, marquise cut)
5ct Fluorite Marquise (18.22×9.11mm)
5.5ct Colored Diamond Marquise (18.34×9.17mm)
Difference: 1% (1.56 mm²)
5.5ct Colored Diamond (Marquise, 18.34×9.17mm) has approx. 1% more face-up area than 5ct Fluorite (Marquise, 18.22×9.11mm).


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