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6ct Aquamarine (Oval, 15.68×10.45mm, Light Blue) vs 3ct Diamond (Oval, 11.7×7.8mm, Light Gray)


Quick summary: When looked from above (face-up position), 6ct Aquamarine (15.68×10.45mm, oval cut) appears 80% larger than 3ct Colored Diamond (11.7×7.8mm, oval cut). See below how they compare side-by-side on a ring and finger.

6ct Aquamarine (oval cut)
vs
 3ct Diamond (oval cut)
light blue
 
light gray
15.68×10.45 mm 11.7×7.8 mm
actual size
Actual size of 6ct Aquamarine (oval cut, 15.68×10.45mm, Light Blue color)   Actual size of 3ct Diamond (oval cut, 11.7×7.8mm, Light Gray color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 6ct Aquamarine (oval cut, 15.68×10.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Gray 3ct Diamond (oval cut, 11.7×7.8mm) 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
 62% vs 47%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 6ct Aquamarine Oval (15.68×10.45mm, Light Blue) and 3ct Diamond Oval (11.7×7.8mm, Light Gray) 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.


6 Ct Aquamarine (Oval) 3 Ct Colored Diamond (Oval)
15.68×10.45 mm vs 11.7×7.8 mm
134.36 mm²   74.83 mm²
Face-up size outline for 6ct Aquamarine (15.68×10.45mm, oval cut)
Face-up size outline for 3ct Diamond (11.7×7.8mm, oval cut)
6ct Aquamarine Oval (15.68×10.45mm)
3ct Colored Diamond Oval (11.7×7.8mm)
Difference: 80% (59.53 mm²)
6ct Aquamarine (Oval, 15.68×10.45mm) has approx. 80% more face-up area than 3ct Colored Diamond (Oval, 11.7×7.8mm).


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