3ct Alexandrite (Round, 8.85×8.85mm, Bluish Green) vs 3ct Tanzanite (Oval, 11.63×7.75mm, Blue)
Quick summary: When looked from above (face-up position), 3ct Tanzanite (11.63×7.75mm, oval cut) appears 20% larger than 3ct Alexandrite (8.85×8.85mm, round cut). See below how they compare side-by-side on a ring and finger.
| 3ct Alexandrite (round cut) |
vs
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3ct Tanzanite (oval cut) |
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bluish green |
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| 8.85×8.85 mm | 11.63×7.75 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
3ct Alexandrite Round (8.85×8.85mm, Bluish Green)
and
3ct Tanzanite Oval (11.63×7.75mm, 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 Tanzanite for a given
carat weight, because it has higher specific gravity
(3.73 vs. 3.35 - this means it's "heavier" compared to Tanzanite 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.
| 3 Ct Alexandrite (Round) | 3 Ct Tanzanite (Oval) | |
| 8.85×8.85 mm | vs | 11.63×7.75 mm |
| 61.51 mm² | 73.91 mm² |
| 3ct Alexandrite Round (8.85×8.85mm) | |
| 3ct Tanzanite Oval (11.63×7.75mm) | |
| Difference: 20% (12.4 mm²) |
3ct Tanzanite (Oval, 11.63×7.75mm) has approx. 20% more face-up area than 3ct Alexandrite (Round, 8.85×8.85mm).
Popular comparisons:
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 4ct Alexandrite (Round, Bluish Green, 9.74 x 9.74)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 3ct Diamond (Round, White, 9.37 x 9.37)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 2ct Alexandrite (Trillion, Bluish Green, 9.09 x 9.09)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 2ct Emerald (Round, Green, 8.59 x 8.59)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 3.5ct Alexandrite (Round, Bluish Green, 9.32 x 9.32)
- 3ct Alexandrite (Round, Bluish Green, 8.85 x 8.85) vs. 3ct Diamond (Emerald, White, 10.64 x 7.14)