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1.1ct Tourmaline (Round, 6.72×6.72mm, Violet) vs 0.42ct Amethyst (Round, 5.14×5.14mm, Violet)


Quick summary: When looked from above (face-up position), 1.1ct Tourmaline (6.72×6.72mm, round cut) appears 71% larger than 0.42ct Amethyst (5.14×5.14mm, round cut). See below how they compare side-by-side on a ring and finger.

1.1ct Tourmaline (round cut)
vs
 0.42ct Amethyst (round cut)
violet
 
violet
6.72×6.72 mm 5.14×5.14 mm
actual size
Actual size of 1.1ct Tourmaline (round cut, 6.72×6.72mm, Violet color)   Actual size of 0.42ct Amethyst (round cut, 5.14×5.14mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 1.1ct Tourmaline (round cut, 6.72×6.72mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 0.42ct Amethyst (round cut, 5.14×5.14mm) 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
 40% vs 31%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1.1ct Tourmaline Round (6.72×6.72mm, Violet) and 0.42ct Amethyst Round (5.14×5.14mm, 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.


1.1 Ct Tourmaline (Round) 0.42 Ct Amethyst (Round)
6.72×6.72 mm vs 5.14×5.14 mm
35.47 mm²   20.75 mm²
Face-up size outline for 1.1ct Tourmaline (6.72×6.72mm, round cut)
Face-up size outline for 0.42ct Amethyst (5.14×5.14mm, round cut)
1.1ct Tourmaline Round (6.72×6.72mm)
0.42ct Amethyst Round (5.14×5.14mm)
Difference: 71% (14.72 mm²)
1.1ct Tourmaline (Round, 6.72×6.72mm) has approx. 71% more face-up area than 0.42ct Amethyst (Round, 5.14×5.14mm).


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