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30ct Tanzanite (Emerald, 21.05×15.59mm, Blue) vs 30ct Aquamarine (Emerald, 22.56×16.71mm, Light Blue)


Quick summary: When looked from above (face-up position), 30ct Aquamarine (22.56×16.71mm, emerald cut) appears 15% larger than 30ct Tanzanite (21.05×15.59mm, emerald cut). See below how they compare side-by-side on a ring and finger.

30ct Tanzanite (emerald cut)
vs
 30ct Aquamarine (emerald cut)
blue
 
light blue
21.05×15.59 mm 22.56×16.71 mm
actual size
Actual size of 30ct Tanzanite (emerald cut, 21.05×15.59mm, Blue color)   Actual size of 30ct Aquamarine (emerald cut, 22.56×16.71mm, 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 30ct Tanzanite (emerald cut, 21.05×15.59mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Blue 30ct Aquamarine (emerald cut, 22.56×16.71mm) 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
 93% vs 99%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 30ct Tanzanite Emerald (21.05×15.59mm, Blue) and 30ct Aquamarine Emerald (22.56×16.71mm, 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, 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.


30 Ct Tanzanite (Emerald) 30 Ct Aquamarine (Emerald)
21.05×15.59 mm vs 22.56×16.71 mm
305.2 mm²   350.59 mm²
Face-up size outline for 30ct Aquamarine (22.56×16.71mm, emerald cut)
Face-up size outline for 30ct Tanzanite (21.05×15.59mm, emerald cut)
30ct Tanzanite Emerald (21.05×15.59mm)
30ct Aquamarine Emerald (22.56×16.71mm)
Difference: 15% (45.39 mm²)
30ct Aquamarine (Emerald, 22.56×16.71mm) has approx. 15% more face-up area than 30ct Tanzanite (Emerald, 21.05×15.59mm).


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