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18ct Hiddenite (Cushion, 15.66×15.66mm, Light Green ) vs 18ct Diopside (Cushion, 15.47×15.47mm, Green)


Quick summary: When looked from above (face-up position), 18ct Hiddenite (15.66×15.66mm, cushion cut) appears 2% larger than 18ct Diopside (15.47×15.47mm, cushion cut). See below how they compare side-by-side on a ring and finger.

18ct Hiddenite (cushion cut)
vs
 18ct Diopside (cushion cut)
light green
 
green
15.66×15.66 mm 15.47×15.47 mm
actual size
Actual size of 18ct Hiddenite (cushion cut, 15.66×15.66mm, Light Green color)   Actual size of 18ct Diopside (cushion cut, 15.47×15.47mm, Green color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Green 18ct Hiddenite (cushion cut, 15.66×15.66mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 18ct Diopside (cushion cut, 15.47×15.47mm) 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
 93% vs 92%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 18ct Hiddenite Cushion (15.66×15.66mm, Light Green ) and 18ct Diopside Cushion (15.47×15.47mm, Green) 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 Hiddenite for a given carat weight, because it has higher specific gravity (3.3 vs. 3.18 - this means it's "heavier" compared to Hiddenite 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.


18 Ct Hiddenite (Cushion) 18 Ct Diopside (Cushion)
15.66×15.66 mm vs 15.47×15.47 mm
220.71 mm²   215.39 mm²
Face-up size outline for 18ct Hiddenite (15.66×15.66mm, cushion cut)
Face-up size outline for 18ct Diopside (15.47×15.47mm, cushion cut)
18ct Hiddenite Cushion (15.66×15.66mm)
18ct Diopside Cushion (15.47×15.47mm)
Difference: 2% (5.32 mm²)
18ct Hiddenite (Cushion, 15.66×15.66mm) has approx. 2% more face-up area than 18ct Diopside (Cushion, 15.47×15.47mm).


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