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Carat vs. Color  Length*  Width*
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(or examine a single gem)
* size in mm (optional)


1.3 Ct Peridot (Cushion)

versus image

0.25 Ct Diamond (Round)

Yellowish Green
 
White
7×7 mm 4.09×4.09 mm
Actual size of 1.3ct Peridot
Actual size of 0.25ct Diamond

Settings
x Ring: Skin tone:
Ring width: 3.0 mm
Saved...
Left finger image
Ring on left finger
Yellowish Green 1.3ct Peridot on a ring
64 mm
Right finger image
Ring on a right finger
White 0.25ct Diamond on a ring
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1.3ct Peridot Cushion (7×7mm, Yellowish Green) and 0.25ct Diamond Round (4.09×4.09mm, White) 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.

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. 3.35 - 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.


1.3 Ct Peridot (Cushion) 0.25 Ct Diamond (Round)
7×7 mm → 44.1 mm² vs. 13.14 mm² ← 4.09×4.09 mm
Face-up size outline
Face-up size outline
1.3ct Peridot Cushion (7×7mm)
0.25ct Diamond Round (4.09×4.09mm)
Difference: 236% (30.96 mm²)
1.3ct Peridot Cushion (7×7mm) has approx. 236% more face-up area than 0.25ct Diamond Round (4.09×4.09mm).


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