4.5ct Tanzanite (Cabochon, 11.99×7.99mm, Blue) vs 4.5ct Kyanite (Cabochon, 11.61×7.74mm, Blue)
Quick summary: When looked from above (face-up position), 4.5ct Tanzanite (11.99×7.99mm, cabochon cut) appears 7% larger than 4.5ct Kyanite (11.61×7.74mm, cabochon cut). See below how they compare side-by-side on a ring and finger.
| 4.5ct Tanzanite (cabochon cut) |
vs
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4.5ct Kyanite (cabochon cut) |
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blue |
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| 11.99×7.99 mm | 11.61×7.74 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
4.5ct Tanzanite Cabochon (11.99×7.99mm, Blue)
and
4.5ct Kyanite Cabochon (11.61×7.74mm, 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.
| 4.5 Ct Tanzanite (Cabochon) | 4.5 Ct Kyanite (Cabochon) | |
| 11.99×7.99 mm | vs | 11.61×7.74 mm |
| 78.56 mm² | 73.69 mm² |
| 4.5ct Tanzanite Cabochon (11.99×7.99mm) | |
| 4.5ct Kyanite Cabochon (11.61×7.74mm) | |
| Difference: 7% (4.87 mm²) |
4.5ct Tanzanite (Cabochon, 11.99×7.99mm) has approx. 7% more face-up area than 4.5ct Kyanite (Cabochon, 11.61×7.74mm).
Popular comparisons:
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Morganite (Cabochon, Light Purple, 7.8 x 5.2)
- 8.5ct Tanzanite (Cabochon, Blue, 14.9 x 9.93) vs. 1ct Diamond (Cushion, White, 5.83 x 5.83)
- 0.2ct Tanzanite (Cabochon, Light Blue, 4.26 x 2.84) vs. 1ct Diamond (Oval, Blue, 8.12 x 5.41)
- 2ct Tanzanite (Cabochon, Blue, 9.2 x 6.13) vs. 1.21ct Emerald (Emerald, Green, 7.76 x 5.75)
- 1.55ct Tanzanite (Cabochon, Blue, 8.45 x 5.63) vs. 1ct Emerald (Trillion, Green, 8.01 x 8.01)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2.23ct Tanzanite (Cabochon, Blue, 9.54 x 6.36) vs. 2.23ct Diamond (Cabochon, White, 9.33 x 6.22)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Diamond (Cabochon, White, 7.14 x 4.76)
- 1ct Tanzanite (Cabochon, Blue, 7.29 x 4.86) vs. 1ct Emerald (Oval, Dark Bluish Green, 8.63 x 5.75)