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28ct Topaz (Marquise, 30.78×15.39mm, Blue) vs 28ct Quartz (Marquise, 33.86×16.93mm, Brown)


Quick summary: When looked from above (face-up position), 28ct Quartz (33.86×16.93mm, marquise cut) appears 21% larger than 28ct Topaz (30.78×15.39mm, marquise cut). See below how they compare side-by-side on a ring and finger.

28ct Topaz (marquise cut)
vs
 28ct Quartz (marquise cut)
blue
 
brown
30.78×15.39 mm 33.86×16.93 mm
actual size
Actual size of 28ct Topaz (marquise cut, 30.78×15.39mm, Blue color)   Actual size of 28ct Quartz (marquise cut, 33.86×16.93mm, Brown color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Blue 28ct Topaz (marquise cut, 30.78×15.39mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Brown 28ct Quartz (marquise cut, 33.86×16.93mm) 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
 92% vs 101%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 28ct Topaz Marquise (30.78×15.39mm, Blue) and 28ct Quartz Marquise (33.86×16.93mm, 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.


28 Ct Topaz (Marquise) 28 Ct Quartz (Marquise)
30.78×15.39 mm vs 33.86×16.93 mm
336.33 mm²   407.01 mm²
Face-up size outline for 28ct Quartz (33.86×16.93mm, marquise cut)
Face-up size outline for 28ct Topaz (30.78×15.39mm, marquise cut)
28ct Topaz Marquise (30.78×15.39mm)
28ct Quartz Marquise (33.86×16.93mm)
Difference: 21% (70.68 mm²)
28ct Quartz (Marquise, 33.86×16.93mm) has approx. 21% more face-up area than 28ct Topaz (Marquise, 30.78×15.39mm).


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