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7ct Amethyst (Emerald, 14.01×10.38mm, Violet) vs 7ct Tanzanite (Emerald, 12.96×9.6mm, Blue)


Quick summary: When looked from above (face-up position), 7ct Amethyst (14.01×10.38mm, emerald cut) appears 17% larger than 7ct Tanzanite (12.96×9.6mm, emerald cut). See below how they compare side-by-side on a ring and finger.

7ct Amethyst (emerald cut)
vs
 7ct Tanzanite (emerald cut)
violet
 
blue
14.01×10.38 mm 12.96×9.6 mm
actual size
Actual size of 7ct Amethyst (emerald cut, 14.01×10.38mm, Violet color)   Actual size of 7ct Tanzanite (emerald cut, 12.96×9.6mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 7ct Amethyst (emerald cut, 14.01×10.38mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7ct Tanzanite (emerald cut, 12.96×9.6mm) 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
 62% vs 57%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Amethyst Emerald (14.01×10.38mm, Violet) and 7ct Tanzanite Emerald (12.96×9.6mm, 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 Amethyst for a given carat weight, because it has higher specific gravity (3.35 vs. 2.65 - this means it's "heavier" compared to Amethyst 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.


7 Ct Amethyst (Emerald) 7 Ct Tanzanite (Emerald)
14.01×10.38 mm vs 12.96×9.6 mm
135.24 mm²   115.71 mm²
Face-up size outline for 7ct Amethyst (14.01×10.38mm, emerald cut)
Face-up size outline for 7ct Tanzanite (12.96×9.6mm, emerald cut)
7ct Amethyst Emerald (14.01×10.38mm)
7ct Tanzanite Emerald (12.96×9.6mm)
Difference: 17% (19.53 mm²)
7ct Amethyst (Emerald, 14.01×10.38mm) has approx. 17% more face-up area than 7ct Tanzanite (Emerald, 12.96×9.6mm).


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