2.5ct Tanzanite (Round, 8.61×8.61mm, Blue) vs 2.5ct Kyanite (Round, 8.34×8.34mm, Blue)
Quick summary: When looked from above (face-up position), 2.5ct Tanzanite (8.61×8.61mm, round cut) appears 7% larger than 2.5ct Kyanite (8.34×8.34mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2.5ct Tanzanite (round cut) |
vs
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2.5ct Kyanite (round cut) |
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blue |
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| 8.61×8.61 mm | 8.34×8.34 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
2.5ct Tanzanite Round (8.61×8.61mm, Blue)
and
2.5ct Kyanite Round (8.34×8.34mm, 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, Kyanite will face-up smaller than Tanzanite for a given
carat weight, because it has higher specific gravity
(3.68 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.
| 2.5 Ct Tanzanite (Round) | 2.5 Ct Kyanite (Round) | |
| 8.61×8.61 mm | vs | 8.34×8.34 mm |
| 58.22 mm² | 54.63 mm² |
| 2.5ct Tanzanite Round (8.61×8.61mm) | |
| 2.5ct Kyanite Round (8.34×8.34mm) | |
| Difference: 7% (3.59 mm²) |
2.5ct Tanzanite (Round, 8.61×8.61mm) has approx. 7% more face-up area than 2.5ct Kyanite (Round, 8.34×8.34mm).
Popular comparisons:
- 1ct Tanzanite (Round, Blue, 6.37 x 6.37) vs. 1ct Diamond (Round, White, 6.5 x 6.5)
- 1ct Tanzanite (Round, Blue, 6.37 x 6.37) vs. 1ct Alexandrite (Round, Light Green , 6.14 x 6.14)
- 1ct Tanzanite (Round, Blue, 6.37 x 6.37) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Tanzanite (Round, Dark Blue, 8.03 x 8.03) vs. 2ct Diamond (Oval, White, 10.23 x 6.82)
- 2ct Tanzanite (Round, Blue, 8.03 x 8.03) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 10ct Tanzanite (Round, Blue, 13.73 x 13.73) vs. 10ct Diamond (Round, White, 14 x 14)
- 1.5ct Tanzanite (Round, Blue, 7.3 x 7.3) vs. 1.5ct Diamond (Round, White, 7.44 x 7.44)
- 1ct Tanzanite (Round, Blue, 6.37 x 6.37) vs. 1ct Emerald (Round, Green, 6.37 x 6.37)
- 0.7ct Tanzanite (Round, Blue, 5.66 x 5.66) vs. 2.5ct Tanzanite (Round, Blue, 8.65 x 8.65)