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0.05ct Aquamarine (Round, 2.51×2.51mm, Light Blue) vs 0.4ct Diamond (Round, 4.79×4.79mm, Black)


Quick summary: When looked from above (face-up position), 0.4ct Colored Diamond (4.79×4.79mm, round cut) appears 3.6 times larger than 0.05ct Aquamarine (2.51×2.51mm, round cut). See below how they compare side-by-side on a ring and finger.

0.05ct Aquamarine (round cut)
vs
 0.4ct Diamond (round cut)
light blue
 
black
2.51×2.51 mm 4.79×4.79 mm
actual size
Actual size of 0.05ct Aquamarine (round cut, 2.51×2.51mm, Light Blue color)   Actual size of 0.4ct Diamond (round cut, 4.79×4.79mm, Black color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 0.05ct Aquamarine (round cut, 2.51×2.51mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Black 0.4ct Diamond (round cut, 4.79×4.79mm) 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
 15% vs 29%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.05ct Aquamarine Round (2.51×2.51mm, Light Blue) and 0.4ct Diamond Round (4.79×4.79mm, Black) 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, Diamond will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.52 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.


0.05 Ct Aquamarine (Round) 0.4 Ct Colored Diamond (Round)
2.51×2.51 mm vs 4.79×4.79 mm
4.95 mm²   18.02 mm²
Face-up size outline for 0.4ct Diamond (4.79×4.79mm, round cut)
Face-up size outline for 0.05ct Aquamarine (2.51×2.51mm, round cut)
0.05ct Aquamarine Round (2.51×2.51mm)
0.4ct Colored Diamond Round (4.79×4.79mm)
Difference: 264% (13.07 mm²)
0.4ct Colored Diamond (Round, 4.79×4.79mm) has approx. 264% more face-up area than 0.05ct Aquamarine (Round, 2.51×2.51mm). In other words, it's 3.64x larger.


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