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8ct Peridot (Cabochon, 14.52×9.68mm, Dark Green) vs 8ct Diamond (Round, 13×13mm, Light Gray)


Quick summary: When looked from above (face-up position), 8ct Colored Diamond (13×13mm, round cut) appears 15% larger than 8ct Peridot (14.52×9.68mm, cabochon cut). See below how they compare side-by-side on a ring and finger.

8ct Peridot (cabochon cut)
vs
 8ct Diamond (round cut)
dark green
 
light gray
14.52×9.68 mm 13×13 mm
actual size
Actual size of 8ct Peridot (cabochon cut, 14.52×9.68mm, Dark Green color)   Actual size of 8ct Diamond (round cut, 13×13mm, Light Gray color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Green 8ct Peridot (cabochon cut, 14.52×9.68mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Gray 8ct Diamond (round cut, 13×13mm) 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
 58% vs 77%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 8ct Peridot Cabochon (14.52×9.68mm, Dark Green) and 8ct Diamond Round (13×13mm, Light Gray) 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, Diamond will face-up smaller than Peridot for a given carat weight, because it has higher specific gravity (3.52 vs. 3.34 - this means it's "heavier" compared to Peridot 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.


8 Ct Peridot (Cabochon) 8 Ct Colored Diamond (Round)
14.52×9.68 mm vs 13×13 mm
115.25 mm²   132.73 mm²
Face-up size outline for 8ct Diamond (13×13mm, round cut)
Face-up size outline for 8ct Peridot (14.52×9.68mm, cabochon cut)
8ct Peridot Cabochon (14.52×9.68mm)
8ct Colored Diamond Round (13×13mm)
Difference: 15% (17.48 mm²)
8ct Colored Diamond (Round, 13×13mm) has approx. 15% more face-up area than 8ct Peridot (Cabochon, 14.52×9.68mm).


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