8.5ct Tanzanite (Marquise, 21.06×10.53mm, Blue) vs 8.5ct Kyanite (Marquise, 20.4×10.2mm, Blue)
Quick summary: When looked from above (face-up position), 8.5ct Tanzanite (21.06×10.53mm, marquise cut) appears 7% larger than 8.5ct Kyanite (20.4×10.2mm, marquise cut). See below how they compare side-by-side on a ring and finger.
| 8.5ct Tanzanite (marquise cut) |
vs
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8.5ct Kyanite (marquise cut) |
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blue |
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| 21.06×10.53 mm | 20.4×10.2 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
8.5ct Tanzanite Marquise (21.06×10.53mm, Blue)
and
8.5ct Kyanite Marquise (20.4×10.2mm, 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.
| 8.5 Ct Tanzanite (Marquise) | 8.5 Ct Kyanite (Marquise) | |
| 21.06×10.53 mm | vs | 20.4×10.2 mm |
| 157.45 mm² | 147.74 mm² |
| 8.5ct Tanzanite Marquise (21.06×10.53mm) | |
| 8.5ct Kyanite Marquise (20.4×10.2mm) | |
| Difference: 7% (9.71 mm²) |
8.5ct Tanzanite (Marquise, 21.06×10.53mm) has approx. 7% more face-up area than 8.5ct Kyanite (Marquise, 20.4×10.2mm).
Popular comparisons:
- 0.8ct Tanzanite (Marquise, Blue, 9 x 4.5) vs. 0.7ct Aquamarine (Marquise, Light Bluish Green, 9 x 5)
- 1ct Tanzanite (Marquise, Blue, 10.52 x 5.26) vs. 1ct Tanzanite (Marquise, Blue, 10 x 5)
- 1ct Tanzanite (Marquise, Blue, 10.52 x 5.26) vs. 1ct Ruby (Marquise, Red, 9.88 x 4.94)
- 0.6ct Tanzanite (Marquise, Blue, 8.88 x 4.44) vs. 0.9ct Tanzanite (Oval, Blue, 7.79 x 5.19)
- 2ct Tanzanite (Marquise, Blue, 13.26 x 6.63) vs. 2ct Diamond (Marquise, White, 13.08 x 6.54)
- 4.5ct Tanzanite (Marquise, Blue, 17.38 x 8.69) vs. 5ct Tanzanite (Cushion, Blue, 12 x 8)
- 1ct Tanzanite (Marquise, Blue, 10 x 5) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 1ct Tanzanite (Marquise, Blue, 10 x 5) vs. 1.5ct Tanzanite (Marquise, Blue, 12.04 x 6.02)
- 1ct Tanzanite (Marquise, Blue, 12 x 6) vs. 1ct Tanzanite (Marquise, Blue, 10 x 5)