carat vs. color  length*  width*

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

0.2 Ct Emerald (Round)


0.08 Ct Diamond (Round)

dark bluish green
3.99×3.99 mm 2.8×2.8 mm
actual size
Actual size of 0.2ct Emerald   Actual size of 0.08ct Diamond
Actual size is set for screen Change
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Dark Bluish Green 0.2ct Emerald on a ring
64 mm
Right finger image
Ring on a right finger
White 0.08ct 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 0.2ct Emerald Round (3.99×3.99mm, Dark Bluish Green) and 0.08ct Diamond Round (2.8×2.8mm, 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 gemstones (Rubies, Saphhires, Emeralds) and especially 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 Emerald for a given carat weight, because it has higher specific gravity (3.52 vs. 2.7 - this means it's "heavier" compared to Emerald 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.

0.2 Ct Emerald (Round) 0.08 Ct Diamond (Round)
3.99×3.99 mm vs 2.8×2.8 mm
12.5 mm²   6.16 mm²
Face-up size outline
Face-up size outline
0.2ct Emerald Round (3.99×3.99mm)
0.08ct Diamond Round (2.8×2.8mm)
Difference: 103% (6.34 mm²)
0.2ct Emerald Round (3.99×3.99mm) has approx. 103% more face-up area than 0.08ct Diamond Round (2.8×2.8mm).

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.