×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

0.93ct Diamond (Round, 6.34×6.34mm, White) vs 0.51ct Sapphire (Round, 4.78×4.78mm, Blue)


Quick summary: When looked from above (face-up position), 0.93ct Diamond (6.34×6.34mm, round cut) appears 76% larger than 0.51ct Sapphire (4.78×4.78mm, round cut). See below how they compare side-by-side on a ring and finger.

0.93ct Diamond (round cut)
vs
 0.51ct Sapphire (round cut)
white
 
blue
6.34×6.34 mm 4.78×4.78 mm
actual size
Actual size of 0.93ct Diamond (round cut, 6.34×6.34mm, White color)   Actual size of 0.51ct Sapphire (round cut, 4.78×4.78mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.93ct Diamond (round cut, 6.34×6.34mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.51ct Sapphire (round cut, 4.78×4.78mm) 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
 38% vs 29%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.93ct Diamond Round (6.34×6.34mm, White) and 0.51ct Sapphire Round (4.78×4.78mm, 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.


0.93 Ct Diamond (Round) 0.51 Ct Sapphire (Round)
6.34×6.34 mm vs 4.78×4.78 mm
31.57 mm²   17.95 mm²
Face-up size outline for 0.93ct Diamond (6.34×6.34mm, round cut)
Face-up size outline for 0.51ct Sapphire (4.78×4.78mm, round cut)
0.93ct Diamond Round (6.34×6.34mm)
0.51ct Sapphire Round (4.78×4.78mm)
Difference: 76% (13.62 mm²)
0.93ct Diamond (Round, 6.34×6.34mm) has approx. 76% more face-up area than 0.51ct Sapphire (Round, 4.78×4.78mm).


Popular comparisons: