Carat vs. Color  Length*  Width*

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

1.25 Ct Amethyst (Cushion)

versus image

1.25 Ct Sapphire (Cushion)

Light Violet
6.91×6.91 mm 6.02×6.02 mm
Actual size of 1.25ct Amethyst
Actual size of 1.25ct Sapphire

x Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Violet 1.25ct Amethyst on a ring
64 mm
Right finger image
Ring on a right finger
Blue 1.25ct Sapphire 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 1.25ct Amethyst Cushion (6.91×6.91mm, Light Violet) and 1.25ct Sapphire Cushion (6.02×6.02mm, 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.

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.

1.25 Ct Amethyst (Cushion) 1.25 Ct Sapphire (Cushion)
6.91×6.91 mm → 42.97 mm² vs. 32.62 mm² ← 6.02×6.02 mm
Face-up size outline
Face-up size outline
1.25ct Amethyst Cushion (6.91×6.91mm)
1.25ct Sapphire Cushion (6.02×6.02mm)
Difference: 32% (10.35 mm²)
1.25ct Amethyst Cushion (6.91×6.91mm) has approx. 32% more face-up area than 1.25ct Sapphire Cushion (6.02×6.02mm).

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