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7ct Sapphire (Emerald, 12.22×9.05mm, Blue) vs 7ct Diamond (Emerald, 12.78×9.47mm, White)


Quick summary: When looked from above (face-up position), 7ct Diamond (12.78×9.47mm, emerald cut) appears 9% larger than 7ct Sapphire (12.22×9.05mm, emerald cut). See below how they compare side-by-side on a ring and finger.

7ct Sapphire (emerald cut)
vs
 7ct Diamond (emerald cut)
blue
 
white
12.22×9.05 mm 12.78×9.47 mm
actual size
Actual size of 7ct Sapphire (emerald cut, 12.22×9.05mm, Blue color)   Actual size of 7ct Diamond (emerald cut, 12.78×9.47mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 7ct Sapphire (emerald cut, 12.22×9.05mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 7ct Diamond (emerald cut, 12.78×9.47mm) 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 57%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Sapphire Emerald (12.22×9.05mm, Blue) and 7ct Diamond Emerald (12.78×9.47mm, 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.


7 Ct Sapphire (Emerald) 7 Ct Diamond (Emerald)
12.22×9.05 mm vs 12.78×9.47 mm
102.85 mm²   112.55 mm²
Face-up size outline for 7ct Diamond (12.78×9.47mm, emerald cut)
Face-up size outline for 7ct Sapphire (12.22×9.05mm, emerald cut)
7ct Sapphire Emerald (12.22×9.05mm)
7ct Diamond Emerald (12.78×9.47mm)
Difference: 9% (9.7 mm²)
7ct Diamond (Emerald, 12.78×9.47mm) has approx. 9% more face-up area than 7ct Sapphire (Emerald, 12.22×9.05mm).


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