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7ct Amethyst (Pear, 18.66×11.24mm, Violet) vs 7ct Tanzanite (Pear, 17.26×10.4mm, Blue)


Quick summary: When looked from above (face-up position), 7ct Amethyst (18.66×11.24mm, pear cut) appears 17% larger than 7ct Tanzanite (17.26×10.4mm, pear cut). See below how they compare side-by-side on a ring and finger.

7ct Amethyst (pear cut)
vs
 7ct Tanzanite (pear cut)
violet
 
blue
18.66×11.24 mm 17.26×10.4 mm
actual size
Actual size of 7ct Amethyst (pear cut, 18.66×11.24mm, Violet color)   Actual size of 7ct Tanzanite (pear cut, 17.26×10.4mm, 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 (pear cut, 18.66×11.24mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 7ct Tanzanite (pear cut, 17.26×10.4mm) 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
 67% vs 62%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7ct Amethyst Pear (18.66×11.24mm, Violet) and 7ct Tanzanite Pear (17.26×10.4mm, 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 (Pear) 7 Ct Tanzanite (Pear)
18.66×11.24 mm vs 17.26×10.4 mm
153.11 mm²   131.04 mm²
Face-up size outline for 7ct Amethyst (18.66×11.24mm, pear cut)
Face-up size outline for 7ct Tanzanite (17.26×10.4mm, pear cut)
7ct Amethyst Pear (18.66×11.24mm)
7ct Tanzanite Pear (17.26×10.4mm)
Difference: 17% (22.07 mm²)
7ct Amethyst (Pear, 18.66×11.24mm) has approx. 17% more face-up area than 7ct Tanzanite (Pear, 17.26×10.4mm).


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