Carat vs. Color  Length*  Width*

(or examine a single gem)
* size in mm (optional)

1 Ct Aquamarine (Oval)

versus image

1 Ct Amethyst (Pear)

Light Blue
8.63×5.75 mm 9.53×5.74 mm
Actual size of 1ct Aquamarine
Actual size of 1ct Amethyst

x Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Blue 1ct Aquamarine on a ring
64 mm
Right finger image
Ring on a right finger
Violet 1ct Amethyst on a ring
Your settings
Skin tone
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Ring diameter: 16.9 mm
Actual sizes of 1ct Aquamarine Oval (8.63×5.75mm, Light Blue) and 1ct Amethyst Pear (9.53×5.74mm, 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.

Face-up Size

All things being equal, Aquamarine will face-up slightly smaller than Amethyst for a given carat weight, because it has higher specific gravity (2.7 vs. 2.65 - this means it's "slightlyheavier" 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 Ct Aquamarine (Oval) 1 Ct Amethyst (Pear)
8.63×5.75 mm → 40.69 mm² vs. 39.93 mm² ← 9.53×5.74 mm
Face-up size outline
Face-up size outline
1ct Aquamarine Oval (8.63×5.75mm)
1ct Amethyst Pear (9.53×5.74mm)
Difference: 2% (0.76 mm²)
1ct Aquamarine Oval (8.63×5.75mm) has approx. 2% more face-up area than 1ct Amethyst Pear (9.53×5.74mm).

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