×
carat vs. color  length*  width*
  ×

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

24ct Topaz (Round, 17.98×17.98mm, Blue) vs 24ct Quartz (Round, 19.78×19.78mm, Brown)


Quick summary: When looked from above (face-up position), 24ct Quartz (19.78×19.78mm, round cut) appears 21% larger than 24ct Topaz (17.98×17.98mm, round cut). See below how they compare side-by-side on a ring and finger.

24ct Topaz (round cut)
vs
 24ct Quartz (round cut)
blue
 
brown
17.98×17.98 mm 19.78×19.78 mm
actual size
Actual size of 24ct Topaz (round cut, 17.98×17.98mm, Blue color)   Actual size of 24ct Quartz (round cut, 19.78×19.78mm, Brown color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 24ct Topaz (round cut, 17.98×17.98mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 24ct Quartz (round cut, 19.78×19.78mm) 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
 107% vs 118%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 24ct Topaz Round (17.98×17.98mm, Blue) and 24ct Quartz Round (19.78×19.78mm, 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, Topaz will face-up smaller than Quartz for a given carat weight, because it has higher specific gravity (3.53 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.


24 Ct Topaz (Round) 24 Ct Quartz (Round)
17.98×17.98 mm vs 19.78×19.78 mm
253.9 mm²   307.29 mm²
Face-up size outline for 24ct Quartz (19.78×19.78mm, round cut)
Face-up size outline for 24ct Topaz (17.98×17.98mm, round cut)
24ct Topaz Round (17.98×17.98mm)
24ct Quartz Round (19.78×19.78mm)
Difference: 21% (53.39 mm²)
24ct Quartz (Round, 19.78×19.78mm) has approx. 21% more face-up area than 24ct Topaz (Round, 17.98×17.98mm).


Popular comparisons: