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16ct Tourmaline (Trillion, 20.14×20.14mm, Purple) vs 16ct Quartz (Trillion, 21.13×21.13mm, Brown)


Quick summary: When looked from above (face-up position), 16ct Quartz (21.13×21.13mm, trillion cut) appears 10% larger than 16ct Tourmaline (20.14×20.14mm, trillion cut). See below how they compare side-by-side on a ring and finger.

16ct Tourmaline (trillion cut)
vs
 16ct Quartz (trillion cut)
purple
 
brown
20.14×20.14 mm 21.13×21.13 mm
actual size
Actual size of 16ct Tourmaline (trillion cut, 20.14×20.14mm, Purple color)   Actual size of 16ct Quartz (trillion cut, 21.13×21.13mm, Brown color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Purple 16ct Tourmaline (trillion cut, 20.14×20.14mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 16ct Quartz (trillion cut, 21.13×21.13mm) 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
 120% vs 126%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 16ct Tourmaline Trillion (20.14×20.14mm, Purple) and 16ct Quartz Trillion (21.13×21.13mm, 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.


16 Ct Tourmaline (Trillion) 16 Ct Quartz (Trillion)
20.14×20.14 mm vs 21.13×21.13 mm
251.48 mm²   276.82 mm²
Face-up size outline for 16ct Quartz (21.13×21.13mm, trillion cut)
Face-up size outline for 16ct Tourmaline (20.14×20.14mm, trillion cut)
16ct Tourmaline Trillion (20.14×20.14mm)
16ct Quartz Trillion (21.13×21.13mm)
Difference: 10% (25.34 mm²)
16ct Quartz (Trillion, 21.13×21.13mm) has approx. 10% more face-up area than 16ct Tourmaline (Trillion, 20.14×20.14mm).


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