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0.12ct Diamond (Round, 3.21×3.21mm, White) vs 0.56ct Ruby (Emerald, 5.27×3.9mm, Red)


Quick summary: When looked from above (face-up position), 0.56ct Ruby (5.27×3.9mm, emerald cut) appears 2.4 times larger than 0.12ct Diamond (3.21×3.21mm, round cut). See below how they compare side-by-side on a ring and finger.

0.12ct Diamond (round cut)
vs
 0.56ct Ruby (emerald cut)
white
 
red
3.21×3.21 mm 5.27×3.9 mm
actual size
Actual size of 0.12ct Diamond (round cut, 3.21×3.21mm, White color)   Actual size of 0.56ct Ruby (emerald cut, 5.27×3.9mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 0.12ct Diamond (round cut, 3.21×3.21mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 0.56ct Ruby (emerald cut, 5.27×3.9mm) 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
 19% vs 24%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.12ct Diamond Round (3.21×3.21mm, White) and 0.56ct Ruby Emerald (5.27×3.9mm, Red) 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, Ruby will face-up smaller than Diamond for a given carat weight, because it has higher specific gravity (4 vs. 3.52 - this means it's "heavier" compared to Diamond 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.


0.12 Ct Diamond (Round) 0.56 Ct Ruby (Emerald)
3.21×3.21 mm vs 5.27×3.9 mm
8.09 mm²   19.11 mm²
Face-up size outline for 0.56ct Ruby (5.27×3.9mm, emerald cut)
Face-up size outline for 0.12ct Diamond (3.21×3.21mm, round cut)
0.12ct Diamond Round (3.21×3.21mm)
0.56ct Ruby Emerald (5.27×3.9mm)
Difference: 136% (11.02 mm²)
0.56ct Ruby (Emerald, 5.27×3.9mm) has approx. 136% more face-up area than 0.12ct Diamond (Round, 3.21×3.21mm). In other words, it's 2.36x larger.


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