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18ct Tourmaline (Pear, 24.37×14.68mm, Purple) vs 18ct Quartz (Pear, 25.56×15.4mm, Brown)


Quick summary: When looked from above (face-up position), 18ct Quartz (25.56×15.4mm, pear cut) appears 10% larger than 18ct Tourmaline (24.37×14.68mm, pear cut). See below how they compare side-by-side on a ring and finger.

18ct Tourmaline (pear cut)
vs
 18ct Quartz (pear cut)
purple
 
brown
24.37×14.68 mm 25.56×15.4 mm
actual size
Actual size of 18ct Tourmaline (pear cut, 24.37×14.68mm, Purple color)   Actual size of 18ct Quartz (pear cut, 25.56×15.4mm, Brown color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 18ct Tourmaline (pear cut, 24.37×14.68mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 18ct Quartz (pear cut, 25.56×15.4mm) 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
 87% vs 92%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 18ct Tourmaline Pear (24.37×14.68mm, Purple) and 18ct Quartz Pear (25.56×15.4mm, 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.


18 Ct Tourmaline (Pear) 18 Ct Quartz (Pear)
24.37×14.68 mm vs 25.56×15.4 mm
261.16 mm²   287.35 mm²
Face-up size outline for 18ct Quartz (25.56×15.4mm, pear cut)
Face-up size outline for 18ct Tourmaline (24.37×14.68mm, pear cut)
18ct Tourmaline Pear (24.37×14.68mm)
18ct Quartz Pear (25.56×15.4mm)
Difference: 10% (26.19 mm²)
18ct Quartz (Pear, 25.56×15.4mm) has approx. 10% more face-up area than 18ct Tourmaline (Pear, 24.37×14.68mm).


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