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18ct Peridot (Cabochon, 19.05×12.7mm, Yellowish Green) vs 18ct Hiddenite (Cabochon, 19.37×12.91mm, Light Green )


Quick summary: When looked from above (face-up position), 18ct Hiddenite (19.37×12.91mm, cabochon cut) appears 3% larger than 18ct Peridot (19.05×12.7mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

18ct Peridot (cabochon cut)
vs
 18ct Hiddenite (cabochon cut)
yellowish green
 
light green
19.05×12.7 mm 19.37×12.91 mm
actual size
Actual size of 18ct Peridot (cabochon cut, 19.05×12.7mm, Yellowish Green color)   Actual size of 18ct Hiddenite (cabochon cut, 19.37×12.91mm, Light Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Yellowish Green 18ct Peridot (cabochon cut, 19.05×12.7mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Green 18ct Hiddenite (cabochon cut, 19.37×12.91mm) 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
 76% vs 77%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 18ct Peridot Cabochon (19.05×12.7mm, Yellowish Green) and 18ct Hiddenite Cabochon (19.37×12.91mm, Light 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, Peridot will face-up smaller than Hiddenite for a given carat weight, because it has higher specific gravity (3.34 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 Peridot (Cabochon) 18 Ct Hiddenite (Cabochon)
19.05×12.7 mm vs 19.37×12.91 mm
198.39 mm²   205.05 mm²
Face-up size outline for 18ct Hiddenite (19.37×12.91mm, cabochon cut)
Face-up size outline for 18ct Peridot (19.05×12.7mm, cabochon cut)
18ct Peridot Cabochon (19.05×12.7mm)
18ct Hiddenite Cabochon (19.37×12.91mm)
Difference: 3% (6.66 mm²)
18ct Hiddenite (Cabochon, 19.37×12.91mm) has approx. 3% more face-up area than 18ct Peridot (Cabochon, 19.05×12.7mm).


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