Carat vs. Color  Length*  Width*

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35 Ct Amethyst (Cushion)

versus image

1 Ct Ruby (Round)

20.98×20.98 mm 5.98×5.98 mm
Actual size of 35ct Amethyst
Actual size of 1ct Ruby

x Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Violet 35ct Amethyst on a ring
64 mm
Right finger image
Ring on a right finger
Red 1ct Ruby 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 35ct Amethyst Cushion (20.98×20.98mm, Violet) and 1ct Ruby Round (5.98×5.98mm, Red) 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, Ruby 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.

35 Ct Amethyst (Cushion) 1 Ct Ruby (Round)
20.98×20.98 mm → 396.14 mm² vs. 28.09 mm² ← 5.98×5.98 mm
Face-up size outline
Face-up size outline
35ct Amethyst Cushion (20.98×20.98mm)
1ct Ruby Round (5.98×5.98mm)
Difference: 1310% (368.05 mm²)
35ct Amethyst Cushion (20.98×20.98mm) has approx. 1310% more face-up area than 1ct Ruby Round (5.98×5.98mm).

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