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0.7ct Sapphire (Oval, 6.72×4.48mm, Blue) vs 9ct Diamond (Round, 13.52×13.52mm, Light Blue)


Quick summary: When looked from above (face-up position), 9ct Colored Diamond (13.52×13.52mm, round cut) appears 5.8 times larger than 0.7ct Sapphire (6.72×4.48mm, oval cut). See below how they compare side-by-side on a ring and finger.

0.7ct Sapphire (oval cut)
vs
 9ct Diamond (round cut)
blue
 
light blue
6.72×4.48 mm 13.52×13.52 mm
actual size
Actual size of 0.7ct Sapphire (oval cut, 6.72×4.48mm, Blue color)   Actual size of 9ct Diamond (round cut, 13.52×13.52mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.7ct Sapphire (oval cut, 6.72×4.48mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 9ct Diamond (round cut, 13.52×13.52mm) 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
 27% vs 80%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.7ct Sapphire Oval (6.72×4.48mm, Blue) and 9ct Diamond Round (13.52×13.52mm, Light Blue) 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.


0.7 Ct Sapphire (Oval) 9 Ct Colored Diamond (Round)
6.72×4.48 mm vs 13.52×13.52 mm
24.69 mm²   143.56 mm²
Face-up size outline for 9ct Diamond (13.52×13.52mm, round cut)
Face-up size outline for 0.7ct Sapphire (6.72×4.48mm, oval cut)
0.7ct Sapphire Oval (6.72×4.48mm)
9ct Colored Diamond Round (13.52×13.52mm)
Difference: 481% (118.87 mm²)
9ct Colored Diamond (Round, 13.52×13.52mm) has approx. 481% more face-up area than 0.7ct Sapphire (Oval, 6.72×4.48mm). In other words, it's 5.81x larger.


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