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4ct Apatite (Emerald, 10.92×8.09mm, Green) vs 9ct Amethyst (Round, 14.26×14.26mm, Violet)


Quick summary: When looked from above (face-up position), 9ct Amethyst (14.26×14.26mm, round cut) appears 94% larger than 4ct Apatite (10.92×8.09mm, emerald cut). See below how they compare side-by-side on a ring and finger.

4ct Apatite (emerald cut)
vs
 9ct Amethyst (round cut)
green
 
violet
10.92×8.09 mm 14.26×14.26 mm
actual size
Actual size of 4ct Apatite (emerald cut, 10.92×8.09mm, Green color)   Actual size of 9ct Amethyst (round cut, 14.26×14.26mm, Violet color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Green 4ct Apatite (emerald cut, 10.92×8.09mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Violet 9ct Amethyst (round cut, 14.26×14.26mm) 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
 48% vs 85%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 4ct Apatite Emerald (10.92×8.09mm, Green) and 9ct Amethyst Round (14.26×14.26mm, 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, Apatite will face-up smaller than Amethyst for a given carat weight, because it has higher specific gravity (3.2 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.


4 Ct Apatite (Emerald) 9 Ct Amethyst (Round)
10.92×8.09 mm vs 14.26×14.26 mm
82.16 mm²   159.71 mm²
Face-up size outline for 9ct Amethyst (14.26×14.26mm, round cut)
Face-up size outline for 4ct Apatite (10.92×8.09mm, emerald cut)
4ct Apatite Emerald (10.92×8.09mm)
9ct Amethyst Round (14.26×14.26mm)
Difference: 94% (77.55 mm²)
9ct Amethyst (Round, 14.26×14.26mm) has approx. 94% more face-up area than 4ct Apatite (Emerald, 10.92×8.09mm).


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