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1ct Quartz (Cabochon, 2.7×17mm, White) vs 1ct Tanzanite (Pear, 8.85×5.33mm, Blue)


Quick summary: When looked from above (face-up position), 1ct Quartz (2.7×17mm, cabochon cut) appears 9% larger than 1ct Tanzanite (8.85×5.33mm, pear cut). See below how they compare side-by-side on a ring and finger.

1ct Quartz (cabochon cut)
vs
 1ct Tanzanite (pear cut)
white
 
blue
2.7×17 mm 8.85×5.33 mm
actual size
Actual size of 1ct Quartz (cabochon cut, 2.7×17mm, White color)   Actual size of 1ct Tanzanite (pear cut, 8.85×5.33mm, Blue color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
White 1ct Quartz (cabochon cut, 2.7×17mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 1ct Tanzanite (pear cut, 8.85×5.33mm) 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
 101% vs 32%
Saved...
Ring diameter: 16.9 mm
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Actual sizes of 1ct Quartz Cabochon (2.7×17mm, White) and 1ct Tanzanite Pear (8.85×5.33mm, Blue) 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, Tanzanite will face-up smaller than Quartz for a given carat weight, because it has higher specific gravity (3.35 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.


1 Ct Quartz (Cabochon) 1 Ct Tanzanite (Pear)
2.7×17 mm vs 8.85×5.33 mm
37.64 mm²   34.43 mm²
Face-up size outline for 1ct Quartz (2.7×17mm, cabochon cut)
Face-up size outline for 1ct Tanzanite (8.85×5.33mm, pear cut)
1ct Quartz Cabochon (2.7×17mm)
1ct Tanzanite Pear (8.85×5.33mm)
Difference: 9% (3.21 mm²)
1ct Quartz (Cabochon, 2.7×17mm) has approx. 9% more face-up area than 1ct Tanzanite (Pear, 8.85×5.33mm).


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