30ct Topaz (Oval, 24.5×16.33mm, Blue) vs 30ct Emerald (Emerald, 22.61×16.75mm, Green)
Quick summary: When looked from above (face-up position), 30ct Emerald (22.61×16.75mm, emerald cut) appears 7% larger than 30ct Topaz (24.5×16.33mm, oval cut). See below how they compare side-by-side on a ring and finger.
| 30ct Topaz (oval cut) |
vs
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30ct Emerald (emerald cut) |
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blue |
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| 24.5×16.33 mm | 22.61×16.75 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 Oval (24.5×16.33mm, Blue)
and
30ct Emerald Emerald (22.61×16.75mm, Green)
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 Emerald for a given
carat weight, because it has higher specific gravity
(3.53 vs. 2.72 - this means it's "heavier" compared to Emerald 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 (Oval) | 30 Ct Emerald (Emerald) | |
| 24.5×16.33 mm | vs | 22.61×16.75 mm |
| 328.07 mm² | 352.21 mm² |
| 30ct Topaz Oval (24.5×16.33mm) | |
| 30ct Emerald Emerald (22.61×16.75mm) | |
| Difference: 7% (24.14 mm²) |
30ct Emerald (Emerald, 22.61×16.75mm) has approx. 7% more face-up area than 30ct Topaz (Oval, 24.5×16.33mm).
Popular comparisons:
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 10ct Aquamarine (Emerald, Light Bluish Green, 15.69 x 11.62)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 1ct Aquamarine (Emerald, Light Blue, 7.28 x 5.39)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 2ct Topaz (Pear, Blue, 10.91 x 6.57)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 5ct Aquamarine (Emerald, Light Blue, 12.45 x 9.22)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 10ct Aquamarine (Emerald, Light Blue, 15.69 x 11.62)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 10ct Topaz (Emerald, Blue, 14.34 x 10.62)
- 30ct Topaz (Oval, Blue, 24.5 x 16.33) vs. 30ct Topaz (Emerald, Blue, 20.68 x 15.32)