×
carat vs. color  length*  width*
  ×

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

1ct Diaspore (Round, 6.31×6.31mm, Light Yellowish Green) vs 1ct Ruby (Oval, 7.56×5.04mm, Red)


Quick summary: When looked from above (face-up position), 1ct Diaspore (6.31×6.31mm, round cut) appears 0.1% larger than 1ct Ruby (7.56×5.04mm, oval cut). See below how they compare side-by-side on a ring and finger.

1ct Diaspore (round cut)
vs
 1ct Ruby (oval cut)
light yellowish green
 
red
6.31×6.31 mm 7.56×5.04 mm
actual size
Actual size of 1ct Diaspore (round cut, 6.31×6.31mm, Light Yellowish Green color)   Actual size of 1ct Ruby (oval cut, 7.56×5.04mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Yellowish Green 1ct Diaspore (round cut, 6.31×6.31mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1ct Ruby (oval cut, 7.56×5.04mm) 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 30%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1ct Diaspore Round (6.31×6.31mm, Light Yellowish Green) and 1ct Ruby Oval (7.56×5.04mm, Red) 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, Ruby will face-up smaller than Diaspore for a given carat weight, because it has higher specific gravity (4 vs. 3.4 - this means it's "heavier" compared to Diaspore 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.


1 Ct Diaspore (Round) 1 Ct Ruby (Oval)
6.31×6.31 mm vs 7.56×5.04 mm
31.27 mm²   31.24 mm²
Face-up size outline for 1ct Diaspore (6.31×6.31mm, round cut)
Face-up size outline for 1ct Ruby (7.56×5.04mm, oval cut)
1ct Diaspore Round (6.31×6.31mm)
1ct Ruby Oval (7.56×5.04mm)
Difference: 0.1% (0.03 mm²)
1ct Diaspore (Round, 6.31×6.31mm) has approx. 0.1% more face-up area than 1ct Ruby (Oval, 7.56×5.04mm).


Popular comparisons: