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4ct Sapphire (Cushion, 8.79×8.79mm, Blue) vs 0.7ct Emerald (Cushion, 5.59×5.59mm, Green)


Quick summary: When looked from above (face-up position), 4ct Sapphire (8.79×8.79mm, cushion cut) appears 2.5 times larger than 0.7ct Emerald (5.59×5.59mm, cushion cut). See below how they compare side-by-side on a ring and finger.

4ct Sapphire (cushion cut)
vs
 0.7ct Emerald (cushion cut)
blue
 
green
8.79×8.79 mm 5.59×5.59 mm
actual size
Actual size of 4ct Sapphire (cushion cut, 8.79×8.79mm, Blue color)   Actual size of 0.7ct Emerald (cushion cut, 5.59×5.59mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 4ct Sapphire (cushion cut, 8.79×8.79mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 0.7ct Emerald (cushion cut, 5.59×5.59mm) 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
 53% vs 34%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Sapphire Cushion (8.79×8.79mm, Blue) and 0.7ct Emerald Cushion (5.59×5.59mm, Green) 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 Emerald for a given carat weight, because it has higher specific gravity (4 vs. 2.72 - this means it's "heavier" compared to Emerald 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.


4 Ct Sapphire (Cushion) 0.7 Ct Emerald (Cushion)
8.79×8.79 mm vs 5.59×5.59 mm
69.54 mm²   28.12 mm²
Face-up size outline for 4ct Sapphire (8.79×8.79mm, cushion cut)
Face-up size outline for 0.7ct Emerald (5.59×5.59mm, cushion cut)
4ct Sapphire Cushion (8.79×8.79mm)
0.7ct Emerald Cushion (5.59×5.59mm)
Difference: 147% (41.42 mm²)
4ct Sapphire (Cushion, 8.79×8.79mm) has approx. 147% more face-up area than 0.7ct Emerald (Cushion, 5.59×5.59mm). In other words, it's 2.47x larger.


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