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4ct Diopside (Round, 10.12×10.12mm, Green) vs 4ct Emerald (Round, 10.79×10.79mm, Green)


Quick summary: When looked from above (face-up position), 4ct Emerald (10.79×10.79mm, round cut) appears 14% larger than 4ct Diopside (10.12×10.12mm, round cut). See below how they compare side-by-side on a ring and finger.

4ct Diopside (round cut)
vs
 4ct Emerald (round cut)
green
 
green
10.12×10.12 mm 10.79×10.79 mm
actual size
Actual size of 4ct Diopside (round cut, 10.12×10.12mm, Green color)   Actual size of 4ct Emerald (round cut, 10.79×10.79mm, Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 4ct Diopside (round cut, 10.12×10.12mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Green 4ct Emerald (round cut, 10.79×10.79mm) 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
 60% vs 64%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Diopside Round (10.12×10.12mm, Green) and 4ct Emerald Round (10.79×10.79mm, 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, Diopside will face-up smaller than Emerald for a given carat weight, because it has higher specific gravity (3.3 vs. 2.72 - 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.


4 Ct Diopside (Round) 4 Ct Emerald (Round)
10.12×10.12 mm vs 10.79×10.79 mm
80.44 mm²   91.44 mm²
Face-up size outline for 4ct Emerald (10.79×10.79mm, round cut)
Face-up size outline for 4ct Diopside (10.12×10.12mm, round cut)
4ct Diopside Round (10.12×10.12mm)
4ct Emerald Round (10.79×10.79mm)
Difference: 14% (11 mm²)
4ct Emerald (Round, 10.79×10.79mm) has approx. 14% more face-up area than 4ct Diopside (Round, 10.12×10.12mm).


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