22ct Tourmaline (Cabochon, 20.97×13.98mm, Purple) vs 22ct Quartz (Cabochon, 21.99×14.66mm, Brown)
Quick summary: When looked from above (face-up position), 22ct Quartz (21.99×14.66mm, cabochon cut) appears 10% larger than 22ct Tourmaline (20.97×13.98mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 22ct Tourmaline (cabochon cut) |
vs
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22ct Quartz (cabochon cut) |
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purple |
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| 20.97×13.98 mm | 21.99×14.66 mm | |
| actual size | ||
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Actual size is set for screen
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Ring:
Skin tone:
Ring width: 3.0 mm
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64 mm |
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Actual sizes of
22ct Tourmaline Cabochon (20.97×13.98mm, Purple)
and
22ct Quartz Cabochon (21.99×14.66mm, 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, 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.
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.
| 22 Ct Tourmaline (Cabochon) | 22 Ct Quartz (Cabochon) | |
| 20.97×13.98 mm | vs | 21.99×14.66 mm |
| 240.39 mm² | 264.35 mm² |
| 22ct Tourmaline Cabochon (20.97×13.98mm) | |
| 22ct Quartz Cabochon (21.99×14.66mm) | |
| Difference: 10% (23.96 mm²) |
22ct Quartz (Cabochon, 21.99×14.66mm) has approx. 10% more face-up area than 22ct Tourmaline (Cabochon, 20.97×13.98mm).
Popular comparisons:
- 1.2ct Tourmaline (Cabochon, Violet, 7.92 x 5.28) vs. 0.45ct Sapphire (Pear, Blue, 6.36 x 3.83)
- 4ct Tourmaline (Cabochon, Violet, 11.82 x 7.88) vs. 5ct Emerald (Cabochon, Green, 13.34 x 8.89)
- 1ct Tourmaline (Cabochon, Dark Bluish Green, 7.46 x 4.97) vs. 1ct Hiddenite (Cabochon, Green, 7.38 x 4.92)
- 1ct Tourmaline (Cabochon, Violet, 7.46 x 4.97) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3.87ct Tourmaline (Cabochon, Violet, 11.7 x 7.8) vs. 2.87ct Tourmaline (Oval, Violet, 11.7 x 7.8)
- 4ct Tourmaline (Cabochon, Dark Yellowish Green, 11.82 x 7.88) vs. 5ct Tourmaline (Heart, Dark Yellowish Green, 10.24 x 10.24)
- 4.98ct Tourmaline (Cabochon, Violet, 12.72 x 8.48) vs. 4.13ct Tourmaline (Cabochon, Violet, 11.96 x 7.97)
- 4.98ct Tourmaline (Cabochon, Violet, 12.72 x 8.48) vs. 4.13ct Ruby (Cabochon, Red, 10.98 x 7.32)