×
carat vs. color  length*  width*
  ×

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

11.29ct Diopside (Marquise, 23.6×11.8mm, Green) vs 8.01ct Amethyst (Oval, 17.36×11.57mm, Violet)


Quick summary: When looked from above (face-up position), 11.29ct Diopside (23.6×11.8mm, marquise cut) appears 20% larger than 8.01ct Amethyst (17.36×11.57mm, oval cut). See below how they compare side-by-side on a ring and finger.

11.29ct Diopside (marquise cut)
vs
 8.01ct Amethyst (oval cut)
green
 
violet
23.6×11.8 mm 17.36×11.57 mm
actual size
Actual size of 11.29ct Diopside (marquise cut, 23.6×11.8mm, Green color)   Actual size of 8.01ct Amethyst (oval cut, 17.36×11.57mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 11.29ct Diopside (marquise cut, 23.6×11.8mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 8.01ct Amethyst (oval cut, 17.36×11.57mm) 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
 70% vs 69%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 11.29ct Diopside Marquise (23.6×11.8mm, Green) and 8.01ct Amethyst Oval (17.36×11.57mm, Violet) 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, Diopside will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (3.3 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.


11.29 Ct Diopside (Marquise) 8.01 Ct Amethyst (Oval)
23.6×11.8 mm vs 17.36×11.57 mm
197.72 mm²   164.7 mm²
Face-up size outline for 11.29ct Diopside (23.6×11.8mm, marquise cut)
Face-up size outline for 8.01ct Amethyst (17.36×11.57mm, oval cut)
11.29ct Diopside Marquise (23.6×11.8mm)
8.01ct Amethyst Oval (17.36×11.57mm)
Difference: 20% (33.02 mm²)
11.29ct Diopside (Marquise, 23.6×11.8mm) has approx. 20% more face-up area than 8.01ct Amethyst (Oval, 17.36×11.57mm).


Popular comparisons: