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Carat vs. Color  Length*  Width*
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(or examine a single gem)
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1 Ct Quartz (Round)

versus image

1 Ct Amethyst (Round)

Orangey Red
 
Violet
6.86×6.86 mm 6.86×6.86 mm
Actual size of 1ct Quartz
Actual size of 1ct Amethyst

Settings
x Ring: Skin tone:
Ring width: 3.0 mm
Saved...
Left finger image
Ring on left finger
Orangey Red 1ct Quartz on a ring
64 mm
Right finger image
Ring on a right finger
Violet 1ct Amethyst on a ring
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 1ct Quartz Round (6.86×6.86mm, Orangey Red) and 1ct Amethyst Round (6.86×6.86mm, 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

Quartz and Amethyst have the same specific gravity so their face-up size depends on the weight, shape and 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 Quartz (Round) 1 Ct Amethyst (Round)
6.86×6.86 mm → 36.96 mm² vs. 36.96 mm² ← 6.86×6.86 mm
Face-up size outline
1ct Quartz Round (6.86×6.86mm)
1ct Amethyst Round (6.86×6.86mm)
Difference: 0% (0 mm²)
1ct Quartz Round (6.86×6.86mm) and 1ct Amethyst Round (6.86×6.86mm) have the same face-up area.


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