30ct Topaz (Emerald, 20.68×15.32mm, Blue) vs 30ct Quartz (Emerald, 22.76×16.86mm, Brown)
Quick summary: When looked from above (face-up position), 30ct Quartz (22.76×16.86mm, emerald cut) appears 21% larger than 30ct Topaz (20.68×15.32mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 30ct Topaz (emerald cut) |
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30ct Quartz (emerald cut) |
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blue |
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| 20.68×15.32 mm | 22.76×16.86 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 Emerald (20.68×15.32mm, Blue)
and
30ct Quartz Emerald (22.76×16.86mm, 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 (Emerald) | 30 Ct Quartz (Emerald) | |
| 20.68×15.32 mm | vs | 22.76×16.86 mm |
| 294.64 mm² | 356.87 mm² |
| 30ct Topaz Emerald (20.68×15.32mm) | |
| 30ct Quartz Emerald (22.76×16.86mm) | |
| Difference: 21% (62.23 mm²) |
30ct Quartz (Emerald, 22.76×16.86mm) has approx. 21% more face-up area than 30ct Topaz (Emerald, 20.68×15.32mm).
Popular comparisons:
- 10ct Topaz (Emerald, White, 14 x 11) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.5ct Topaz (Emerald, Blue, 5.28 x 3.91) vs. 0.6ct Topaz (Emerald, Blue, 5.62 x 4.16)
- 11ct Topaz (Emerald, Blue, 14.81 x 10.97) vs. 11ct Diamond (Emerald, White, 14.86 x 11.01)
- 2ct Topaz (Emerald, Dark Bluish Green, 9 x 7) vs. 3ct Topaz (Emerald, Blue, 10 x 8)
- 10ct Topaz (Emerald, Blue, 14.34 x 10.62) vs. 23ct Kunzite (Cushion, Light Purple, 17.17 x 17.17)
- 26ct Topaz (Emerald, Violet, 19.72 x 14.61) vs. 8ct Amethyst (Emerald, Violet, 14.65 x 10.85)
- 9ct Topaz (Emerald, Light Blue, 13.85 x 10.26) vs. 9ct Diamond (Emerald, White, 13.89 x 10.29)
- 1.7ct Topaz (Emerald, Blue, 7.95 x 5.89) vs. 1.7ct Citrine (Oval, Light Orange, 10.35 x 6.9)
- 20ct Topaz (Emerald, Blue, 18.08 x 13.39) vs. 0.13ct Aquamarine (Round, Light Blue, 3.45 x 3.45)