×
carat vs. color  length*  width*
  ×

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

2.7ct Diamond (Emerald, 9.3×6.89mm, White) vs 3.1ct Sapphire (Emerald, 9.1×6.25mm, Blue)


Quick summary: When looked from above (face-up position), 2.7ct Diamond (9.3×6.89mm, emerald cut) appears 13% larger than 3.1ct Sapphire (9.1×6.25mm, emerald cut). See below how they compare side-by-side on a ring and finger.

2.7ct Diamond (emerald cut)
vs
 3.1ct Sapphire (emerald cut)
white
 
blue
9.3×6.89 mm 9.1×6.25 mm
actual size
Actual size of 2.7ct Diamond (emerald cut, 9.3×6.89mm, White color)   Actual size of 3.1ct Sapphire (emerald cut, 9.1×6.25mm, 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 (emerald cut, 9.3×6.89mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3.1ct Sapphire (emerald cut, 9.1×6.25mm) 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
 41% vs 37%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 2.7ct Diamond Emerald (9.3×6.89mm, White) and 3.1ct Sapphire Emerald (9.1×6.25mm, 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 (Emerald) 3.1 Ct Sapphire (Emerald)
9.3×6.89 mm vs 9.1×6.25 mm
59.59 mm²   52.89 mm²
Face-up size outline for 2.7ct Diamond (9.3×6.89mm, emerald cut)
Face-up size outline for 3.1ct Sapphire (9.1×6.25mm, emerald cut)
2.7ct Diamond Emerald (9.3×6.89mm)
3.1ct Sapphire Emerald (9.1×6.25mm)
Difference: 13% (6.7 mm²)
2.7ct Diamond (Emerald, 9.3×6.89mm) has approx. 13% more face-up area than 3.1ct Sapphire (Emerald, 9.1×6.25mm).


Popular comparisons: