30ct Kyanite (Cushion, 17.68×17.68mm, Blue) vs 30ct Sapphire (Cushion, 17.2×17.2mm, Blue)
Quick summary: When looked from above (face-up position), 30ct Kyanite (17.68×17.68mm, cushion cut) appears 6% larger than 30ct Sapphire (17.2×17.2mm, cushion cut). See below how they compare side-by-side on a ring and finger.
| 30ct Kyanite (cushion cut) |
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30ct Sapphire (cushion cut) |
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blue |
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| 17.68×17.68 mm | 17.2×17.2 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
30ct Kyanite Cushion (17.68×17.68mm, Blue)
and
30ct Sapphire Cushion (17.2×17.2mm, 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, Sapphire will face-up smaller than Kyanite for a given
carat weight, because it has higher specific gravity
(4 vs. 3.68 - this means it's "heavier" compared to Kyanite 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.
| 30 Ct Kyanite (Cushion) | 30 Ct Sapphire (Cushion) | |
| 17.68×17.68 mm | vs | 17.2×17.2 mm |
| 281.32 mm² | 266.26 mm² |
| 30ct Kyanite Cushion (17.68×17.68mm) | |
| 30ct Sapphire Cushion (17.2×17.2mm) | |
| Difference: 6% (15.06 mm²) |
30ct Kyanite (Cushion, 17.68×17.68mm) has approx. 6% more face-up area than 30ct Sapphire (Cushion, 17.2×17.2mm).
Popular comparisons:
- 1.5ct Kyanite (Cushion, Blue, 6.58 x 6.58) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2ct Kyanite (Cushion, Blue, 7.24 x 7.24) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 20ct Kyanite (Cushion, Blue, 15.61 x 15.61) vs. 20ct Morganite (Cushion, Light Purple, 17.3 x 17.3)
- 2.58ct Kyanite (Cushion, Blue, 7.89 x 7.89) vs. 3ct Tanzanite (Emerald, Blue, 9.81 x 7.27)
- 1ct Kyanite (Cushion, Blue, 5.75 x 5.75) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2ct Kyanite (Cushion, Blue, 7.24 x 7.24) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.5ct Kyanite (Cushion, Blue, 7.8 x 7.8) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.7ct Ruby (Pear, Red, 10 x 7) vs. 3ct Ruby (Emerald, Red, 9 x 7)
- 1.5ct Tourmaline (Round, Light Red, 7.45 x 7.45) vs. 1.5ct Sapphire (Round, Light Blue, 6.84 x 6.84)