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0.5ct Amethyst (Oval, 6.89×4.59mm, Violet) vs 0.2ct Sapphire (Round, 3.5×3.5mm, Blue)


Quick summary: When looked from above (face-up position), 0.5ct Amethyst (6.89×4.59mm, oval cut) appears 2.7 times larger than 0.2ct Sapphire (3.5×3.5mm, round cut). See below how they compare side-by-side on a ring and finger.

0.5ct Amethyst (oval cut)
vs
 0.2ct Sapphire (round cut)
violet
 
blue
6.89×4.59 mm 3.5×3.5 mm
actual size
Actual size of 0.5ct Amethyst (oval cut, 6.89×4.59mm, Violet color)   Actual size of 0.2ct Sapphire (round cut, 3.5×3.5mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 0.5ct Amethyst (oval cut, 6.89×4.59mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 0.2ct Sapphire (round cut, 3.5×3.5mm) 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
 28% vs 21%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 0.5ct Amethyst Oval (6.89×4.59mm, Violet) and 0.2ct Sapphire Round (3.5×3.5mm, 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.


0.5 Ct Amethyst (Oval) 0.2 Ct Sapphire (Round)
6.89×4.59 mm vs 3.5×3.5 mm
25.93 mm²   9.62 mm²
Face-up size outline for 0.5ct Amethyst (6.89×4.59mm, oval cut)
Face-up size outline for 0.2ct Sapphire (3.5×3.5mm, round cut)
0.5ct Amethyst Oval (6.89×4.59mm)
0.2ct Sapphire Round (3.5×3.5mm)
Difference: 170% (16.31 mm²)
0.5ct Amethyst (Oval, 6.89×4.59mm) has approx. 170% more face-up area than 0.2ct Sapphire (Round, 3.5×3.5mm). In other words, it's 2.7x larger.


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