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2.7ct Diamond (Oval, 11.3×7.53mm, White) vs 0.45ct Sapphire (Round, 4.58×4.58mm, Blue)


Quick summary: When looked from above (face-up position), 2.7ct Diamond (11.3×7.53mm, oval cut) appears 4.2 times larger than 0.45ct Sapphire (4.58×4.58mm, round cut). See below how they compare side-by-side on a ring and finger.

2.7ct Diamond (oval cut)
vs
 0.45ct Sapphire (round cut)
white
 
blue
11.3×7.53 mm 4.58×4.58 mm
actual size
Actual size of 2.7ct Diamond (oval cut, 11.3×7.53mm, White color)   Actual size of 0.45ct Sapphire (round cut, 4.58×4.58mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 2.7ct Diamond (oval cut, 11.3×7.53mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.45ct Sapphire (round cut, 4.58×4.58mm) 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
 45% vs 28%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 2.7ct Diamond Oval (11.3×7.53mm, White) and 0.45ct Sapphire Round (4.58×4.58mm, 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.


2.7 Ct Diamond (Oval) 0.45 Ct Sapphire (Round)
11.3×7.53 mm vs 4.58×4.58 mm
69.77 mm²   16.47 mm²
Face-up size outline for 2.7ct Diamond (11.3×7.53mm, oval cut)
Face-up size outline for 0.45ct Sapphire (4.58×4.58mm, round cut)
2.7ct Diamond Oval (11.3×7.53mm)
0.45ct Sapphire Round (4.58×4.58mm)
Difference: 324% (53.3 mm²)
2.7ct Diamond (Oval, 11.3×7.53mm) has approx. 324% more face-up area than 0.45ct Sapphire (Round, 4.58×4.58mm). In other words, it's 4.24x larger.


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