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8ct Sapphire (Emerald, 12.77×9.46mm, Blue) vs 2ct Diamond (Emerald, 8.42×6.24mm, White)


Quick summary: When looked from above (face-up position), 8ct Sapphire (12.77×9.46mm, emerald cut) appears 2.3 times larger than 2ct Diamond (8.42×6.24mm, emerald cut). See below how they compare side-by-side on a ring and finger.

8ct Sapphire (emerald cut)
vs
 2ct Diamond (emerald cut)
blue
 
white
12.77×9.46 mm 8.42×6.24 mm
actual size
Actual size of 8ct Sapphire (emerald cut, 12.77×9.46mm, Blue color)   Actual size of 2ct Diamond (emerald cut, 8.42×6.24mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 8ct Sapphire (emerald cut, 12.77×9.46mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 2ct Diamond (emerald cut, 8.42×6.24mm) 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
 56% vs 37%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 8ct Sapphire Emerald (12.77×9.46mm, Blue) and 2ct Diamond Emerald (8.42×6.24mm, 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.


8 Ct Sapphire (Emerald) 2 Ct Diamond (Emerald)
12.77×9.46 mm vs 8.42×6.24 mm
112.35 mm²   48.86 mm²
Face-up size outline for 8ct Sapphire (12.77×9.46mm, emerald cut)
Face-up size outline for 2ct Diamond (8.42×6.24mm, emerald cut)
8ct Sapphire Emerald (12.77×9.46mm)
2ct Diamond Emerald (8.42×6.24mm)
Difference: 130% (63.49 mm²)
8ct Sapphire (Emerald, 12.77×9.46mm) has approx. 130% more face-up area than 2ct Diamond (Emerald, 8.42×6.24mm). In other words, it's 2.3x larger.


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