17ct Alexandrite (Princess, 13.82×13.82mm, Bluish Green) vs 17ct Topaz (Princess, 14.08×14.08mm, Blue)
Quick summary: When looked from above (face-up position), 17ct Topaz (14.08×14.08mm, princess cut) appears 4% larger than 17ct Alexandrite (13.82×13.82mm, princess cut). See below how they compare side-by-side on a ring and finger.
| 17ct Alexandrite (princess cut) |
vs
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17ct Topaz (princess cut) |
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bluish green |
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| 13.82×13.82 mm | 14.08×14.08 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
17ct Alexandrite Princess (13.82×13.82mm, Bluish Green)
and
17ct Topaz Princess (14.08×14.08mm, 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, Alexandrite will face-up smaller than Topaz for a given
carat weight, because it has higher specific gravity
(3.73 vs. 3.53 - this means it's "heavier" compared to Topaz 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.
| 17 Ct Alexandrite (Princess) | 17 Ct Topaz (Princess) | |
| 13.82×13.82 mm | vs | 14.08×14.08 mm |
| 190.99 mm² | 198.25 mm² |
| 17ct Alexandrite Princess (13.82×13.82mm) | |
| 17ct Topaz Princess (14.08×14.08mm) | |
| Difference: 4% (7.26 mm²) |
17ct Topaz (Princess, 14.08×14.08mm) has approx. 4% more face-up area than 17ct Alexandrite (Princess, 13.82×13.82mm).
Popular comparisons:
- 1ct Alexandrite (Princess, Bluish Green, 5.52 x 5.52) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 0.1ct Alexandrite (Princess, Bluish Green, 2.56 x 2.56) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 4.2ct Alexandrite (Princess, Violet, 8.9 x 8.9) vs. 5ct Alexandrite (Princess, Bluish Green, 9.43 x 9.43)
- 2ct Alexandrite (Princess, Bluish Green, 6.95 x 6.95) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1.63ct Alexandrite (Princess, Bluish Green, 6.49 x 6.49) vs. 1.28ct Alexandrite (Princess, Bluish Green, 5.99 x 5.99)
- 0.25ct Alexandrite (Princess, Bluish Green, 3.48 x 3.48) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 10ct Alexandrite (Princess, Bluish Green, 11.88 x 11.88) vs. 10ct Emerald (Emerald, Green, 15.69 x 11.62)
- 2ct Alexandrite (Princess, Bluish Green, 6.95 x 6.95) vs. 2ct Emerald (Emerald, Green, 9.17 x 6.79)
- 0.5ct Alexandrite (Princess, Bluish Green, 4.38 x 4.38) vs. 0.4ct Diamond (Round, White, 4.79 x 4.79)