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1ct Amethyst (Oval, 9×7mm, Violet) vs 1ct Tourmaline (Oval, 8×6mm, Violet)


Quick summary: When looked from above (face-up position), 1ct Amethyst (9×7mm, oval cut) appears 31% larger than 1ct Tourmaline (8×6mm, oval cut). See below how they compare side-by-side on a ring and finger.

1ct Amethyst (oval cut)
vs
 1ct Tourmaline (oval cut)
violet
 
violet
9×7 mm 8×6 mm
actual size
Actual size of 1ct Amethyst (oval cut, 9×7mm, Violet color)   Actual size of 1ct Tourmaline (oval cut, 8×6mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 1ct Amethyst (oval cut, 9×7mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 1ct Tourmaline (oval cut, 8×6mm) 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
 42% vs 36%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Amethyst Oval (9×7mm, Violet) and 1ct Tourmaline Oval (8×6mm, 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, Tourmaline will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (3.06 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 Ct Amethyst (Oval) 1 Ct Tourmaline (Oval)
9×7 mm vs 8×6 mm
51.66 mm²   39.36 mm²
Face-up size outline for 1ct Amethyst (9×7mm, oval cut)
Face-up size outline for 1ct Tourmaline (8×6mm, oval cut)
1ct Amethyst Oval (9×7mm)
1ct Tourmaline Oval (8×6mm)
Difference: 31% (12.3 mm²)
1ct Amethyst (Oval, 9×7mm) has approx. 31% more face-up area than 1ct Tourmaline (Oval, 8×6mm).


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