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0.8ct Tanzanite (Marquise, 9×4.5mm, Blue) vs 0.7ct Aquamarine (Marquise, 9×5mm, Light Bluish Green)


Quick summary: When looked from above (face-up position), 0.7ct Aquamarine (9×5mm, marquise cut) appears 11% larger than 0.8ct Tanzanite (9×4.5mm, marquise cut). See below how they compare side-by-side on a ring and finger.

0.8ct Tanzanite (marquise cut)
vs
 0.7ct Aquamarine (marquise cut)
blue
 
light bluish green
9×4.5 mm 9×5 mm
actual size
Actual size of 0.8ct Tanzanite (marquise cut, 9×4.5mm, Blue color)   Actual size of 0.7ct Aquamarine (marquise cut, 9×5mm, Light Bluish Green color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 0.8ct Tanzanite (marquise cut, 9×4.5mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Bluish Green 0.7ct Aquamarine (marquise cut, 9×5mm) 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
 27% vs 30%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 0.8ct Tanzanite Marquise (9×4.5mm, Blue) and 0.7ct Aquamarine Marquise (9×5mm, Light Bluish Green) 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, Tanzanite will face-up smaller than Aquamarine for a given carat weight, because it has higher specific gravity (3.35 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.


0.8 Ct Tanzanite (Marquise) 0.7 Ct Aquamarine (Marquise)
9×4.5 mm vs 9×5 mm
28.76 mm²   31.95 mm²
Face-up size outline for 0.7ct Aquamarine (9×5mm, marquise cut)
Face-up size outline for 0.8ct Tanzanite (9×4.5mm, marquise cut)
0.8ct Tanzanite Marquise (9×4.5mm)
0.7ct Aquamarine Marquise (9×5mm)
Difference: 11% (3.19 mm²)
0.7ct Aquamarine (Marquise, 9×5mm) has approx. 11% more face-up area than 0.8ct Tanzanite (Marquise, 9×4.5mm).


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