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0.75ct Aquamarine (Round, 6.19×6.19mm, Light Blue) vs 0.86ct Diamond (Round, 6.18×6.18mm, White)


Quick summary: When looked from above (face-up position), 0.75ct Aquamarine (6.19×6.19mm, round cut) appears 0.3% larger than 0.86ct Diamond (6.18×6.18mm, round cut). See below how they compare side-by-side on a ring and finger.

0.75ct Aquamarine (round cut)
vs
 0.86ct Diamond (round cut)
light blue
 
white
6.19×6.19 mm 6.18×6.18 mm
actual size
Actual size of 0.75ct Aquamarine (round cut, 6.19×6.19mm, Light Blue color)   Actual size of 0.86ct Diamond (round cut, 6.18×6.18mm, White color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 0.75ct Aquamarine (round cut, 6.19×6.19mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
White 0.86ct Diamond (round cut, 6.18×6.18mm) 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
 37% vs 37%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.75ct Aquamarine Round (6.19×6.19mm, Light Blue) and 0.86ct Diamond Round (6.18×6.18mm, 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?

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.


0.75 Ct Aquamarine (Round) 0.86 Ct Diamond (Round)
6.19×6.19 mm vs 6.18×6.18 mm
30.09 mm²   30 mm²
Face-up size outline for 0.75ct Aquamarine (6.19×6.19mm, round cut)
Face-up size outline for 0.86ct Diamond (6.18×6.18mm, round cut)
0.75ct Aquamarine Round (6.19×6.19mm)
0.86ct Diamond Round (6.18×6.18mm)
Difference: 0.3% (0.09 mm²)
0.75ct Aquamarine (Round, 6.19×6.19mm) has approx. 0.3% more face-up area than 0.86ct Diamond (Round, 6.18×6.18mm).


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