40ct Topaz (Marquise, 34.66×17.33mm, Blue) vs 40ct Quartz (Marquise, 38.14×19.07mm, Brown)
Quick summary: When looked from above (face-up position), 40ct Quartz (38.14×19.07mm, marquise cut) appears 21% larger than 40ct Topaz (34.66×17.33mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 40ct Topaz (marquise cut) |
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40ct Quartz (marquise cut) |
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blue |
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| 34.66×17.33 mm | 38.14×19.07 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
40ct Topaz Marquise (34.66×17.33mm, Blue)
and
40ct Quartz Marquise (38.14×19.07mm, 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.
| 40 Ct Topaz (Marquise) | 40 Ct Quartz (Marquise) | |
| 34.66×17.33 mm | vs | 38.14×19.07 mm |
| 426.47 mm² | 516.4 mm² |
| 40ct Topaz Marquise (34.66×17.33mm) | |
| 40ct Quartz Marquise (38.14×19.07mm) | |
| Difference: 21% (89.93 mm²) |
40ct Quartz (Marquise, 38.14×19.07mm) has approx. 21% more face-up area than 40ct Topaz (Marquise, 34.66×17.33mm).
Popular comparisons:
- 1ct Topaz (Marquise, Blue, 10.3 x 5.15) vs. 1ct Diamond (Marquise, White, 10.38 x 5.19)
- 2ct Topaz (Marquise, Blue, 12.96 x 6.48) vs. 1ct Topaz (Round, Blue, 6.23 x 6.23)
- 3ct Topaz (Marquise, Orange, 14.84 x 7.42) vs. 1ct Topaz (Marquise, Orange, 10.3 x 5.15)
- 1.5ct Topaz (Marquise, Blue, 11.78 x 5.89) vs. 1.5ct Zircon (Pear, Orange, 9.05 x 5.45)
- 2ct Topaz (Marquise, Bluish Green, 12.96 x 6.48) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Topaz (Marquise, Blue, 10.3 x 5.15) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.5ct Topaz (Marquise, Blue, 11.78 x 5.89) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.5ct Topaz (Marquise, Blue, 13.96 x 6.98) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 0.15ct Topaz (Marquise, Blue, 5.46 x 2.73) vs. 0.8ct Topaz (Pear, Blue, 8.03 x 4.84)