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18ct Hiddenite (Round, 16.91×16.91mm, Light Green ) vs 18ct Diopside (Round, 16.71×16.71mm, Green)


Quick summary: When looked from above (face-up position), 18ct Hiddenite (16.91×16.91mm, round cut) appears 2% larger than 18ct Diopside (16.71×16.71mm, round cut). See below how they compare side-by-side on a ring and finger.

18ct Hiddenite (round cut)
vs
 18ct Diopside (round cut)
light green
 
green
16.91×16.91 mm 16.71×16.71 mm
actual size
Actual size of 18ct Hiddenite (round cut, 16.91×16.91mm, Light Green color)   Actual size of 18ct Diopside (round cut, 16.71×16.71mm, 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 (round cut, 16.91×16.91mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 18ct Diopside (round cut, 16.71×16.71mm) 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
 101% vs 99%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Hiddenite Round (16.91×16.91mm, Light Green ) and 18ct Diopside Round (16.71×16.71mm, 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 (Round) 18 Ct Diopside (Round)
16.91×16.91 mm vs 16.71×16.71 mm
224.58 mm²   219.3 mm²
Face-up size outline for 18ct Hiddenite (16.91×16.91mm, round cut)
Face-up size outline for 18ct Diopside (16.71×16.71mm, round cut)
18ct Hiddenite Round (16.91×16.91mm)
18ct Diopside Round (16.71×16.71mm)
Difference: 2% (5.28 mm²)
18ct Hiddenite (Round, 16.91×16.91mm) has approx. 2% more face-up area than 18ct Diopside (Round, 16.71×16.71mm).


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