13.21ct Aquamarine (Emerald, 21×11.5mm, Light Blue) vs 18.13ct Topaz (Emerald, 17.5×13mm, Blue)
Quick summary: When looked from above (face-up position), 13.21ct Aquamarine (21×11.5mm, emerald cut) appears 6% larger than 18.13ct Topaz (17.5×13mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 13.21ct Aquamarine (emerald cut) |
vs
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18.13ct Topaz (emerald cut) |
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light blue |
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| 21×11.5 mm | 17.5×13 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
13.21ct Aquamarine Emerald (21×11.5mm, Light Blue)
and
18.13ct Topaz Emerald (17.5×13mm, Blue)
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 Aquamarine for a given
carat weight, because it has higher specific gravity
(3.53 vs. 2.72 - this means it's "heavier" compared to Aquamarine 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.
| 13.21 Ct Aquamarine (Emerald) | 18.13 Ct Topaz (Emerald) | |
| 21×11.5 mm | vs | 17.5×13 mm |
| 224.6 mm² | 211.58 mm² |
| 13.21ct Aquamarine Emerald (21×11.5mm) | |
| 18.13ct Topaz Emerald (17.5×13mm) | |
| Difference: 6% (13.02 mm²) |
13.21ct Aquamarine (Emerald, 21×11.5mm) has approx. 6% more face-up area than 18.13ct Topaz (Emerald, 17.5×13mm).
Popular comparisons:
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 4.01ct Aquamarine (Oval, Light Blue, 12 x 9)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 6ct Diamond (Cushion, White, 10.59 x 10.59)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 2ct Diamond (Cushion, White, 7.34 x 7.34)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 5ct Diamond (Cushion, White, 9.96 x 9.96)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 5.5ct Diamond (Cushion, White, 10.28 x 10.28)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 2.75ct Diamond (Cushion, White, 8.16 x 8.16)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 5.77ct Aquamarine (Emerald, Light Blue, 11 x 10)
- 13.21ct Aquamarine (Emerald, Light Blue, 21 x 11.5) vs. 6.98ct Aquamarine (Cushion, Light Blue, 12 x 11)