carat vs. color  length*  width*

(or examine a single gem)
* size in mm (optional)

1.3 Ct Peridot (Cushion)


0.25 Ct Diamond (Round)

yellowish green
7×7 mm 4.09×4.09 mm
actual size
Actual size of 1.3ct Peridot   Actual size of 0.25ct Diamond
Actual size is set for screen Change
Ring: Skin tone:
Ring width: 3.0 mm
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
Skin tone
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Ring diameter: 16.9 mm
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.

Where to buy?

JamesAllen → high-quality Diamonds, high-end jewelry and competitive prices. Highly recommended.
Amazon → usually offers a good selection from many different vendors. Worth a check.

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 vs 4.09×4.09 mm
44.1 mm²   13.14 mm²
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).

Popular comparisons:

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Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.