30ct Topaz (Cabochon, 22.17×14.78mm, Blue) vs 30ct Quartz (Cabochon, 24.39×16.26mm, Brown)
Quick summary: When looked from above (face-up position), 30ct Quartz (24.39×16.26mm, cabochon cut) appears 21% larger than 30ct Topaz (22.17×14.78mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 30ct Topaz (cabochon cut) |
vs
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30ct Quartz (cabochon cut) |
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blue |
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| 22.17×14.78 mm | 24.39×16.26 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
30ct Topaz Cabochon (22.17×14.78mm, Blue)
and
30ct Quartz Cabochon (24.39×16.26mm, 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.
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.
| 30 Ct Topaz (Cabochon) | 30 Ct Quartz (Cabochon) | |
| 22.17×14.78 mm | vs | 24.39×16.26 mm |
| 268.69 mm² | 325.2 mm² |
| 30ct Topaz Cabochon (22.17×14.78mm) | |
| 30ct Quartz Cabochon (24.39×16.26mm) | |
| Difference: 21% (56.51 mm²) |
30ct Quartz (Cabochon, 24.39×16.26mm) has approx. 21% more face-up area than 30ct Topaz (Cabochon, 22.17×14.78mm).
Popular comparisons:
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86)
- 1ct Topaz (Cabochon, Light Bluish Green, 5 x 7) vs. 1ct Tourmaline (Cabochon, Yellowish Green, 6 x 6)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 0.5ct Topaz (Round, Blue, 5 x 5)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Topaz (Cabochon, Light Bluish Green, 7.14 x 4.76) vs. 1ct Peridot (Cushion, Green, 6.5 x 4.5)
- 7.5ct Topaz (Cabochon, White, 13.97 x 9.31) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 25ct Topaz (Cabochon, Orange, 20.87 x 13.91) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4.98ct Topaz (Cabochon, Blue, 12.18 x 8.12) vs. 4.13ct Topaz (Cabochon, Blue, 11.45 x 7.63)
- 1ct Topaz (Cabochon, Blue, 7.14 x 4.76) vs. 1ct Topaz (Princess, Bluish Green, 6 x 6)