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13.43ct Quartz (Oval, 18×13.2mm, Light Green ) vs 11.37ct Tourmaline (Cushion, 14.5×12.2mm, Light Orange)


Quick summary: When looked from above (face-up position), 13.43ct Quartz (18×13.2mm, oval cut) appears 22% larger than 11.37ct Tourmaline (14.5×12.2mm, cushion cut). See below how they compare side-by-side on a ring and finger.

13.43ct Quartz (oval cut)
vs
 11.37ct Tourmaline (cushion cut)
light green
 
light orange
18×13.2 mm 14.5×12.2 mm
actual size
Actual size of 13.43ct Quartz (oval cut, 18×13.2mm, Light Green color)   Actual size of 11.37ct Tourmaline (cushion cut, 14.5×12.2mm, Light Orange color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Light Green 13.43ct Quartz (oval cut, 18×13.2mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Light Orange 11.37ct Tourmaline (cushion cut, 14.5×12.2mm) 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
 79% vs 73%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 13.43ct Quartz Oval (18×13.2mm, Light Green ) and 11.37ct Tourmaline Cushion (14.5×12.2mm, Light Orange) 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.


13.43 Ct Quartz (Oval) 11.37 Ct Tourmaline (Cushion)
18×13.2 mm vs 14.5×12.2 mm
194.83 mm²   159.21 mm²
Face-up size outline for 13.43ct Quartz (18×13.2mm, oval cut)
Face-up size outline for 11.37ct Tourmaline (14.5×12.2mm, cushion cut)
13.43ct Quartz Oval (18×13.2mm)
11.37ct Tourmaline Cushion (14.5×12.2mm)
Difference: 22% (35.62 mm²)
13.43ct Quartz (Oval, 18×13.2mm) has approx. 22% more face-up area than 11.37ct Tourmaline (Cushion, 14.5×12.2mm).


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