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11ct Tourmaline (Oval, 18.65×12.43mm, Purple) vs 11ct Quartz (Oval, 19.56×13.04mm, Brown)


Quick summary: When looked from above (face-up position), 11ct Quartz (19.56×13.04mm, oval cut) appears 10% larger than 11ct Tourmaline (18.65×12.43mm, oval cut). See below how they compare side-by-side on a ring and finger.

11ct Tourmaline (oval cut)
vs
 11ct Quartz (oval cut)
purple
 
brown
18.65×12.43 mm 19.56×13.04 mm
actual size
Actual size of 11ct Tourmaline (oval cut, 18.65×12.43mm, Purple color)   Actual size of 11ct Quartz (oval cut, 19.56×13.04mm, Brown color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 11ct Tourmaline (oval cut, 18.65×12.43mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 11ct Quartz (oval cut, 19.56×13.04mm) 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
 74% vs 78%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 11ct Tourmaline Oval (18.65×12.43mm, Purple) and 11ct Quartz Oval (19.56×13.04mm, 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.


11 Ct Tourmaline (Oval) 11 Ct Quartz (Oval)
18.65×12.43 mm vs 19.56×13.04 mm
190.09 mm²   209.15 mm²
Face-up size outline for 11ct Quartz (19.56×13.04mm, oval cut)
Face-up size outline for 11ct Tourmaline (18.65×12.43mm, oval cut)
11ct Tourmaline Oval (18.65×12.43mm)
11ct Quartz Oval (19.56×13.04mm)
Difference: 10% (19.06 mm²)
11ct Quartz (Oval, 19.56×13.04mm) has approx. 10% more face-up area than 11ct Tourmaline (Oval, 18.65×12.43mm).


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