×
carat vs. color  length*  width*
  ×

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

2.52ct Sapphire (Emerald, 8.32×6.4mm, Blue) vs 0.42ct Diamond (Oval, 6.29×3.89mm, White)


Quick summary: When looked from above (face-up position), 2.52ct Sapphire (8.32×6.4mm, emerald cut) appears 2.5 times larger than 0.42ct Diamond (6.29×3.89mm, oval cut). See below how they compare side-by-side on a ring and finger.

2.52ct Sapphire (emerald cut)
vs
 0.42ct Diamond (oval cut)
blue
 
white
8.32×6.4 mm 6.29×3.89 mm
actual size
Actual size of 2.52ct Sapphire (emerald cut, 8.32×6.4mm, Blue color)   Actual size of 0.42ct Diamond (oval cut, 6.29×3.89mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 2.52ct Sapphire (emerald cut, 8.32×6.4mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.42ct Diamond (oval cut, 6.29×3.89mm) 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 24%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.52ct Sapphire Emerald (8.32×6.4mm, Blue) and 0.42ct Diamond Oval (6.29×3.89mm, 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.


2.52 Ct Sapphire (Emerald) 0.42 Ct Diamond (Oval)
8.32×6.4 mm vs 6.29×3.89 mm
49.52 mm²   20.06 mm²
Face-up size outline for 2.52ct Sapphire (8.32×6.4mm, emerald cut)
Face-up size outline for 0.42ct Diamond (6.29×3.89mm, oval cut)
2.52ct Sapphire Emerald (8.32×6.4mm)
0.42ct Diamond Oval (6.29×3.89mm)
Difference: 147% (29.46 mm²)
2.52ct Sapphire (Emerald, 8.32×6.4mm) has approx. 147% more face-up area than 0.42ct Diamond (Oval, 6.29×3.89mm). In other words, it's 2.47x larger.


Popular comparisons: