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17ct Apatite (Trillion, 20.25×20.25mm, Green) vs 17ct Peridot (Trillion, 19.96×19.96mm, Yellowish Green)


Quick summary: When looked from above (face-up position), 17ct Apatite (20.25×20.25mm, trillion cut) appears 3% larger than 17ct Peridot (19.96×19.96mm, trillion cut). See below how they compare side-by-side on a ring and finger.

17ct Apatite (trillion cut)
vs
 17ct Peridot (trillion cut)
green
 
yellowish green
20.25×20.25 mm 19.96×19.96 mm
actual size
Actual size of 17ct Apatite (trillion cut, 20.25×20.25mm, Green color)   Actual size of 17ct Peridot (trillion cut, 19.96×19.96mm, Yellowish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 17ct Apatite (trillion cut, 20.25×20.25mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Yellowish Green 17ct Peridot (trillion cut, 19.96×19.96mm) 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
 120% vs 119%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 17ct Apatite Trillion (20.25×20.25mm, Green) and 17ct Peridot Trillion (19.96×19.96mm, Yellowish 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 Apatite for a given carat weight, because it has higher specific gravity (3.34 vs. 3.2 - this means it's "heavier" compared to Apatite 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.


17 Ct Apatite (Trillion) 17 Ct Peridot (Trillion)
20.25×20.25 mm vs 19.96×19.96 mm
254.24 mm²   247.01 mm²
Face-up size outline for 17ct Apatite (20.25×20.25mm, trillion cut)
Face-up size outline for 17ct Peridot (19.96×19.96mm, trillion cut)
17ct Apatite Trillion (20.25×20.25mm)
17ct Peridot Trillion (19.96×19.96mm)
Difference: 3% (7.23 mm²)
17ct Apatite (Trillion, 20.25×20.25mm) has approx. 3% more face-up area than 17ct Peridot (Trillion, 19.96×19.96mm).


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