×
carat vs. color  length*  width*
  ×

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

13ct Tourmaline (Asscher, 13.71×13.71mm, Purple) vs 13ct Quartz (Asscher, 14.38×14.38mm, Brown)


Quick summary: When looked from above (face-up position), 13ct Quartz (14.38×14.38mm, asscher cut) appears 10% larger than 13ct Tourmaline (13.71×13.71mm, asscher cut). See below how they compare side-by-side on a ring and finger.

13ct Tourmaline (asscher cut)
vs
 13ct Quartz (asscher cut)
purple
 
brown
13.71×13.71 mm 14.38×14.38 mm
actual size
Actual size of 13ct Tourmaline (asscher cut, 13.71×13.71mm, Purple color)   Actual size of 13ct Quartz (asscher cut, 14.38×14.38mm, Brown color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 13ct Tourmaline (asscher cut, 13.71×13.71mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 13ct Quartz (asscher cut, 14.38×14.38mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 82% vs 86%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 13ct Tourmaline Asscher (13.71×13.71mm, Purple) and 13ct Quartz Asscher (14.38×14.38mm, Brown) 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 certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

All things being equal, Tourmaline will face-up smaller than Quartz for a given carat weight, because it has higher specific gravity (3.06 vs. 2.65 - this means it's "heavier" compared to Quartz 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.


13 Ct Tourmaline (Asscher) 13 Ct Quartz (Asscher)
13.71×13.71 mm vs 14.38×14.38 mm
172.93 mm²   190.24 mm²
Face-up size outline for 13ct Quartz (14.38×14.38mm, asscher cut)
Face-up size outline for 13ct Tourmaline (13.71×13.71mm, asscher cut)
13ct Tourmaline Asscher (13.71×13.71mm)
13ct Quartz Asscher (14.38×14.38mm)
Difference: 10% (17.31 mm²)
13ct Quartz (Asscher, 14.38×14.38mm) has approx. 10% more face-up area than 13ct Tourmaline (Asscher, 13.71×13.71mm).


Popular comparisons: