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0.21ct Diamond (Round, 3.86×3.86mm, White) vs 0.92ct Sapphire (Oval, 7.35×4.9mm, Blue)


Quick summary: When looked from above (face-up position), 0.92ct Sapphire (7.35×4.9mm, oval cut) appears 2.5 times larger than 0.21ct Diamond (3.86×3.86mm, round cut). See below how they compare side-by-side on a ring and finger.

0.21ct Diamond (round cut)
vs
 0.92ct Sapphire (oval cut)
white
 
blue
3.86×3.86 mm 7.35×4.9 mm
actual size
Actual size of 0.21ct Diamond (round cut, 3.86×3.86mm, White color)   Actual size of 0.92ct Sapphire (oval cut, 7.35×4.9mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.21ct Diamond (round cut, 3.86×3.86mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.92ct Sapphire (oval cut, 7.35×4.9mm) 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
 23% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.21ct Diamond Round (3.86×3.86mm, White) and 0.92ct Sapphire Oval (7.35×4.9mm, 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.


0.21 Ct Diamond (Round) 0.92 Ct Sapphire (Oval)
3.86×3.86 mm vs 7.35×4.9 mm
11.7 mm²   29.53 mm²
Face-up size outline for 0.92ct Sapphire (7.35×4.9mm, oval cut)
Face-up size outline for 0.21ct Diamond (3.86×3.86mm, round cut)
0.21ct Diamond Round (3.86×3.86mm)
0.92ct Sapphire Oval (7.35×4.9mm)
Difference: 152% (17.83 mm²)
0.92ct Sapphire (Oval, 7.35×4.9mm) has approx. 152% more face-up area than 0.21ct Diamond (Round, 3.86×3.86mm). In other words, it's 2.52x larger.


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