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Carat vs. Color  Length*  Width*
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2 Ct Amethyst (Cushion)

versus image

2 Ct Tanzanite (Cushion)

Violet
 
Blue
8.08×8.08 mm 7.51×7.51 mm
Actual size of 2ct Amethyst
Actual size of 2ct Tanzanite

Settings
x Ring: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on left finger
Violet 2ct Amethyst on a ring
64 mm
Right finger image
Ring on a right finger
Blue 2ct Tanzanite on a ring
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
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Ring diameter: 16.9 mm
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Actual sizes of 2ct Amethyst Cushion (8.08×8.08mm, Violet) and 2ct Tanzanite Cushion (7.51×7.51mm, 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.

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 (3.3 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.


2 Ct Amethyst (Cushion) 2 Ct Tanzanite (Cushion)
8.08×8.08 mm → 58.76 mm² vs. 50.76 mm² ← 7.51×7.51 mm
Face-up size outline
Face-up size outline
2ct Amethyst Cushion (8.08×8.08mm)
2ct Tanzanite Cushion (7.51×7.51mm)
Difference: 16% (8 mm²)
2ct Amethyst Cushion (8.08×8.08mm) has approx. 16% more face-up area than 2ct Tanzanite Cushion (7.51×7.51mm).


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