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7.4ct Amethyst (Oval, 16.91×11.27mm, Violet) vs 1ct Ruby (Round, 5.98×5.98mm, Red)


Quick summary: When looked from above (face-up position), 7.4ct Amethyst (16.91×11.27mm, oval cut) appears 5.6 times larger than 1ct Ruby (5.98×5.98mm, round cut). See below how they compare side-by-side on a ring and finger.

7.4ct Amethyst (oval cut)
vs
 1ct Ruby (round cut)
violet
 
red
16.91×11.27 mm 5.98×5.98 mm
actual size
Actual size of 7.4ct Amethyst (oval cut, 16.91×11.27mm, Violet color)   Actual size of 1ct Ruby (round cut, 5.98×5.98mm, Red color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 7.4ct Amethyst (oval cut, 16.91×11.27mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 1ct Ruby (round cut, 5.98×5.98mm) 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 36%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 7.4ct Amethyst Oval (16.91×11.27mm, Violet) and 1ct Ruby Round (5.98×5.98mm, Red) 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, Ruby will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (4 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.


7.4 Ct Amethyst (Oval) 1 Ct Ruby (Round)
16.91×11.27 mm vs 5.98×5.98 mm
156.27 mm²   28.09 mm²
Face-up size outline for 7.4ct Amethyst (16.91×11.27mm, oval cut)
Face-up size outline for 1ct Ruby (5.98×5.98mm, round cut)
7.4ct Amethyst Oval (16.91×11.27mm)
1ct Ruby Round (5.98×5.98mm)
Difference: 456% (128.18 mm²)
7.4ct Amethyst (Oval, 16.91×11.27mm) has approx. 456% more face-up area than 1ct Ruby (Round, 5.98×5.98mm). In other words, it's 5.56x larger.


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