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6.5ct Amethyst (Pear, 18.21×10.97mm, Violet) vs 6.5ct Tanzanite (Pear, 16.83×10.14mm, Blue)


Quick summary: When looked from above (face-up position), 6.5ct Amethyst (18.21×10.97mm, pear cut) appears 17% larger than 6.5ct Tanzanite (16.83×10.14mm, pear cut). See below how they compare side-by-side on a ring and finger.

6.5ct Amethyst (pear cut)
vs
 6.5ct Tanzanite (pear cut)
violet
 
blue
18.21×10.97 mm 16.83×10.14 mm
actual size
Actual size of 6.5ct Amethyst (pear cut, 18.21×10.97mm, Violet color)   Actual size of 6.5ct Tanzanite (pear cut, 16.83×10.14mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 6.5ct Amethyst (pear cut, 18.21×10.97mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 6.5ct Tanzanite (pear cut, 16.83×10.14mm) 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
 65% vs 61%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 6.5ct Amethyst Pear (18.21×10.97mm, Violet) and 6.5ct Tanzanite Pear (16.83×10.14mm, 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.


6.5 Ct Amethyst (Pear) 6.5 Ct Tanzanite (Pear)
18.21×10.97 mm vs 16.83×10.14 mm
145.83 mm²   124.58 mm²
Face-up size outline for 6.5ct Amethyst (18.21×10.97mm, pear cut)
Face-up size outline for 6.5ct Tanzanite (16.83×10.14mm, pear cut)
6.5ct Amethyst Pear (18.21×10.97mm)
6.5ct Tanzanite Pear (16.83×10.14mm)
Difference: 17% (21.25 mm²)
6.5ct Amethyst (Pear, 18.21×10.97mm) has approx. 17% more face-up area than 6.5ct Tanzanite (Pear, 16.83×10.14mm).


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