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1.63ct Tanzanite (Marquise, 12.38×6.19mm, Blue) vs 1.02ct Amethyst (Pear, 9.59×5.78mm, Violet)


Quick summary: When looked from above (face-up position), 1.63ct Tanzanite (12.38×6.19mm, marquise cut) appears 34% larger than 1.02ct Amethyst (9.59×5.78mm, pear cut). See below how they compare side-by-side on a ring and finger.

1.63ct Tanzanite (marquise cut)
vs
 1.02ct Amethyst (pear cut)
blue
 
violet
12.38×6.19 mm 9.59×5.78 mm
actual size
Actual size of 1.63ct Tanzanite (marquise cut, 12.38×6.19mm, Blue color)   Actual size of 1.02ct Amethyst (pear cut, 9.59×5.78mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 1.63ct Tanzanite (marquise cut, 12.38×6.19mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 1.02ct Amethyst (pear cut, 9.59×5.78mm) 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
 37% vs 35%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.63ct Tanzanite Marquise (12.38×6.19mm, Blue) and 1.02ct Amethyst Pear (9.59×5.78mm, Violet) 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.


1.63 Ct Tanzanite (Marquise) 1.02 Ct Amethyst (Pear)
12.38×6.19 mm vs 9.59×5.78 mm
54.41 mm²   40.46 mm²
Face-up size outline for 1.63ct Tanzanite (12.38×6.19mm, marquise cut)
Face-up size outline for 1.02ct Amethyst (9.59×5.78mm, pear cut)
1.63ct Tanzanite Marquise (12.38×6.19mm)
1.02ct Amethyst Pear (9.59×5.78mm)
Difference: 34% (13.95 mm²)
1.63ct Tanzanite (Marquise, 12.38×6.19mm) has approx. 34% more face-up area than 1.02ct Amethyst (Pear, 9.59×5.78mm).


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