20ct Tanzanite (Emerald, 18.39×13.62mm, Blue) vs 20ct Aquamarine (Emerald, 19.71×14.6mm, Light Blue)
Quick summary: When looked from above (face-up position), 20ct Aquamarine (19.71×14.6mm, emerald cut) appears 15% larger than 20ct Tanzanite (18.39×13.62mm, emerald cut). See below how they compare side-by-side on a ring and finger.
| 20ct Tanzanite (emerald cut) |
vs
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20ct Aquamarine (emerald cut) |
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blue |
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| 18.39×13.62 mm | 19.71×14.6 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
20ct Tanzanite Emerald (18.39×13.62mm, Blue)
and
20ct Aquamarine Emerald (19.71×14.6mm, Light 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, Tanzanite will face-up smaller than Aquamarine for a given
carat weight, because it has higher specific gravity
(3.35 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.
| 20 Ct Tanzanite (Emerald) | 20 Ct Aquamarine (Emerald) | |
| 18.39×13.62 mm | vs | 19.71×14.6 mm |
| 232.94 mm² | 267.62 mm² |
| 20ct Tanzanite Emerald (18.39×13.62mm) | |
| 20ct Aquamarine Emerald (19.71×14.6mm) | |
| Difference: 15% (34.68 mm²) |
20ct Aquamarine (Emerald, 19.71×14.6mm) has approx. 15% more face-up area than 20ct Tanzanite (Emerald, 18.39×13.62mm).
Popular comparisons:
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 3ct Tanzanite (Emerald, Blue, 9.81 x 7.27)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 4ct Tanzanite (Emerald, Blue, 10.81 x 8.01)
- 0.49ct Tanzanite (Emerald, Blue, 5.37 x 3.98) vs. 0.5ct Emerald (Emerald, Green, 5.78 x 4.28)
- 1ct Tanzanite (Emerald, Blue, 6.8 x 5.04) vs. 1ct Diamond (Emerald, White, 6.68 x 4.95)
- 5ct Tanzanite (Emerald, Blue, 11.64 x 8.62) vs. 2ct Diamond (Marquise, White, 13.08 x 6.54)
- 2ct Tanzanite (Emerald, Blue, 8.57 x 6.35) vs. 2ct Diamond (Emerald, White, 8.42 x 6.24)
- 6ct Tanzanite (Emerald, Blue, 12.37 x 9.16) vs. 13ct Tanzanite (Emerald, Blue, 16.01 x 11.86)
- 3.5ct Tanzanite (Emerald, Blue, 10.34 x 7.66) vs. 0.4ct Diamond (Cushion, Purple, 4.29 x 4.29)