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3.4ct Sapphire (Cushion, 9×7mm, Blue) vs 3.4ct Diamond (Cushion, 9×7mm, White)


Quick summary: Compared gemstones have equal face-up area.

3.4ct Sapphire (cushion cut)
vs
 3.4ct Diamond (cushion cut)
blue
 
white
9×7 mm 9×7 mm
actual size
Actual size of 3.4ct Sapphire (cushion cut, 9×7mm, Blue color)   Actual size of 3.4ct Diamond (cushion cut, 9×7mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 3.4ct Sapphire (cushion cut, 9×7mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 3.4ct Diamond (cushion cut, 9×7mm) 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
 42% vs 42%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 3.4ct Sapphire Cushion (9×7mm, Blue) and 3.4ct Diamond Cushion (9×7mm, 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.


3.4 Ct Sapphire (Cushion) 3.4 Ct Diamond (Cushion)
9×7 mm vs 9×7 mm
56.7 mm²   56.7 mm²
Face-up size outline for true size of 9×7mm
3.4ct Sapphire Cushion (9×7mm)
3.4ct Diamond Cushion (9×7mm)
Difference: 0% (0 mm²)
3.4ct Sapphire (Cushion, 9×7mm) and 3.4ct Diamond (Cushion, 9×7mm) have the same face-up area.


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