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1ct Diamond (Round, 6.5×6.5mm, Blue) vs 3ct Aquamarine (Baguette, 11.4×7.6mm, Light Blue)


Quick summary: When looked from above (face-up position), 3ct Aquamarine (11.4×7.6mm, baguette cut) appears 2.6 times larger than 1ct Colored Diamond (6.5×6.5mm, round cut). See below how they compare side-by-side on a ring and finger.

1ct Diamond (round cut)
vs
 3ct Aquamarine (baguette cut)
blue
 
light blue
6.5×6.5 mm 11.4×7.6 mm
actual size
Actual size of 1ct Diamond (round cut, 6.5×6.5mm, Blue color)   Actual size of 3ct Aquamarine (baguette cut, 11.4×7.6mm, Light Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1ct Diamond (round cut, 6.5×6.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 3ct Aquamarine (baguette cut, 11.4×7.6mm) 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
 39% vs 45%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Diamond Round (6.5×6.5mm, Blue) and 3ct Aquamarine Baguette (11.4×7.6mm, Light Blue) 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.


1 Ct Colored Diamond (Round) 3 Ct Aquamarine (Baguette)
6.5×6.5 mm vs 11.4×7.6 mm
33.18 mm²   86.64 mm²
Face-up size outline for 3ct Aquamarine (11.4×7.6mm, baguette cut)
Face-up size outline for 1ct Diamond (6.5×6.5mm, round cut)
1ct Colored Diamond Round (6.5×6.5mm)
3ct Aquamarine Baguette (11.4×7.6mm)
Difference: 161% (53.46 mm²)
3ct Aquamarine (Baguette, 11.4×7.6mm) has approx. 161% more face-up area than 1ct Colored Diamond (Round, 6.5×6.5mm). In other words, it's 2.61x larger.


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