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6ct Sapphire (Emerald, 11.6×8.59mm, Blue) vs 6ct Diamond (Oval, 14.75×9.83mm, White)


Quick summary: When looked from above (face-up position), 6ct Diamond (14.75×9.83mm, oval cut) appears 28% larger than 6ct Sapphire (11.6×8.59mm, emerald cut). See below how they compare side-by-side on a ring and finger.

6ct Sapphire (emerald cut)
vs
6ct Diamond (oval cut)
blue
 
white
11.6×8.59 mm 14.75×9.83 mm
actual size
Actual size of 6ct Sapphire (emerald cut, 11.6×8.59mm, Blue color)   Actual size of 6ct Diamond (oval cut, 14.75×9.83mm, White color)
 
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Left finger image
Ring on left finger
Blue 6ct Sapphire (emerald cut, 11.6×8.59mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 6ct Diamond (oval cut, 14.75×9.83mm) on a right ring and finger
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Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
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Ring diameter: 16.9 mm
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Actual sizes of 6ct Sapphire Emerald (11.6×8.59mm, Blue) and 6ct Diamond Oval (14.75×9.83mm, White) 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 Diamond for a given carat weight, because it has higher specific gravity (4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


6 Ct Sapphire (Emerald) 6 Ct Diamond (Oval)
11.6×8.59 mm vs 14.75×9.83 mm
92.67 mm²   118.89 mm²
Face-up size outline for 6ct Diamond (14.75×9.83mm, oval cut)
Face-up size outline for 6ct Sapphire (11.6×8.59mm, emerald cut)
6ct Sapphire Emerald (11.6×8.59mm)
6ct Diamond Oval (14.75×9.83mm)
Difference: 28% (26.22 mm²)
6ct Diamond Oval (14.75×9.83mm) has approx. 28% more face-up area than 6ct Sapphire Emerald (11.6×8.59mm).


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