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12ct Topaz (Trillion, 17.45×17.45mm, Blue) vs 12ct Quartz (Trillion, 19.2×19.2mm, Brown)


Quick summary: When looked from above (face-up position), 12ct Quartz (19.2×19.2mm, trillion cut) appears 21% larger than 12ct Topaz (17.45×17.45mm, trillion cut). See below how they compare side-by-side on a ring and finger.

12ct Topaz (trillion cut)
vs
 12ct Quartz (trillion cut)
blue
 
brown
17.45×17.45 mm 19.2×19.2 mm
actual size
Actual size of 12ct Topaz (trillion cut, 17.45×17.45mm, Blue color)   Actual size of 12ct Quartz (trillion cut, 19.2×19.2mm, Brown color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 12ct Topaz (trillion cut, 17.45×17.45mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 12ct Quartz (trillion cut, 19.2×19.2mm) 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
 104% vs 114%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 12ct Topaz Trillion (17.45×17.45mm, Blue) and 12ct Quartz Trillion (19.2×19.2mm, 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.


12 Ct Topaz (Trillion) 12 Ct Quartz (Trillion)
17.45×17.45 mm vs 19.2×19.2 mm
188.79 mm²   228.56 mm²
Face-up size outline for 12ct Quartz (19.2×19.2mm, trillion cut)
Face-up size outline for 12ct Topaz (17.45×17.45mm, trillion cut)
12ct Topaz Trillion (17.45×17.45mm)
12ct Quartz Trillion (19.2×19.2mm)
Difference: 21% (39.77 mm²)
12ct Quartz (Trillion, 19.2×19.2mm) has approx. 21% more face-up area than 12ct Topaz (Trillion, 17.45×17.45mm).


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