carat vs. color  length*  width*

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

5 Ct Quartz (Round)


5 Ct Amethyst (Round)

orangey red
11.73×11.73 mm 11.73×11.73 mm
actual size
Actual size of 5ct Quartz   Actual size of 5ct Amethyst
Actual size is set for screen Change
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Orangey Red 5ct Quartz on a ring
64 mm
Right finger image
Ring on a right finger
Violet 5ct 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 5ct Quartz Round (11.73×11.73mm, Orangey Red) and 5ct Amethyst Round (11.73×11.73mm, 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 Quartz or Amethyst check what Amazon has to offer. You'll usually find quite a selection from many different vendors. Worth a check. For other high quality gemstones (Rubies, Saphhires, Emeralds) and especially Diamonds, I highly recommend JamesAllen.

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.

5 Ct Quartz (Round) 5 Ct Amethyst (Round)
11.73×11.73 mm vs 11.73×11.73 mm
108.07 mm²   108.07 mm²
Face-up size outline
5ct Quartz Round (11.73×11.73mm)
5ct Amethyst Round (11.73×11.73mm)
Difference: 0% (0 mm²)
5ct Quartz Round (11.73×11.73mm) and 5ct Amethyst Round (11.73×11.73mm) have the same face-up area.

Popular comparisons:

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Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.