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1.9ct Amethyst (Oval, 10.74×7.16mm, Violet) vs 0.5ct Sapphire (Round, 4.75×4.75mm, Blue)


Quick summary: When looked from above (face-up position), 1.9ct Amethyst (10.74×7.16mm, oval cut) appears 3.6 times larger than 0.5ct Sapphire (4.75×4.75mm, round cut). See below how they compare side-by-side on a ring and finger.

1.9ct Amethyst (oval cut)
vs
0.5ct Sapphire (round cut)
violet
 
blue
10.74×7.16 mm 4.75×4.75 mm
actual size
Actual size of 1.9ct Amethyst (oval cut, 10.74×7.16mm, Violet color)   Actual size of 0.5ct Sapphire (round cut, 4.75×4.75mm, Blue color)
 
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Ring: Skin tone:
Ring width: 3.0 mm
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Left finger image
Ring on left finger
Violet 1.9ct Amethyst (oval cut, 10.74×7.16mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.5ct Sapphire (round cut, 4.75×4.75mm) 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
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Ring diameter: 16.9 mm
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Actual sizes of 1.9ct Amethyst Oval (10.74×7.16mm, Violet) and 0.5ct Sapphire Round (4.75×4.75mm, 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.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Sapphire 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.


1.9 Ct Amethyst (Oval) 0.5 Ct Sapphire (Round)
10.74×7.16 mm vs 4.75×4.75 mm
63.06 mm²   17.72 mm²
Face-up size outline for 1.9ct Amethyst (10.74×7.16mm, oval cut)
Face-up size outline for 0.5ct Sapphire (4.75×4.75mm, round cut)
1.9ct Amethyst Oval (10.74×7.16mm)
0.5ct Sapphire Round (4.75×4.75mm)
Difference: 256% (45.34 mm²)
1.9ct Amethyst Oval (10.74×7.16mm) has approx. 256% more face-up area than 0.5ct Sapphire Round (4.75×4.75mm). In other words, it's 3.56x larger.


Popular comparisons:

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