15ct Kyanite (Round, 15.16×15.16mm, Blue) vs 15ct Diamond (Round, 16.03×16.03mm, White)
Quick summary: When looked from above (face-up position), 15ct Diamond (16.03×16.03mm, round cut) appears 12% larger than 15ct Kyanite (15.16×15.16mm, round cut). See below how they compare side-by-side on a ring and finger.
| 15ct Kyanite (round cut) |
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15ct Diamond (round cut) |
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| 15.16×15.16 mm | 16.03×16.03 mm | |
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Actual sizes of
15ct Kyanite Round (15.16×15.16mm, Blue)
and
15ct Diamond Round (16.03×16.03mm, White)
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 Diamond for a given
carat weight, because it has higher specific gravity
(3.68 vs. 3.52 - this means it's "heavier" compared to Diamond 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.
| 15 Ct Kyanite (Round) | 15 Ct Diamond (Round) | |
| 15.16×15.16 mm | vs | 16.03×16.03 mm |
| 180.5 mm² | 201.82 mm² |
| 15ct Kyanite Round (15.16×15.16mm) | |
| 15ct Diamond Round (16.03×16.03mm) | |
| Difference: 12% (21.32 mm²) |
15ct Diamond Round (16.03×16.03mm) has approx. 12% more face-up area than 15ct Kyanite Round (15.16×15.16mm).
Popular comparisons:
- 15ct Kyanite (Round, Blue, 15.16 x 15.16) vs. 15ct Diamond (Emerald, White, 16.48 x 12.21)
- 15ct Kyanite (Round, Blue, 15.16 x 15.16) vs. 12ct Diamond (Round, White, 14.88 x 14.88)
- 1ct Kyanite (Round, Blue, 6.15 x 6.15) vs. 1ct Emerald (Emerald, Green, 7.28 x 5.39)
- 2ct Kyanite (Round, Blue, 7.74 x 7.74) vs. 1.83ct Diamond (Round, White, 7.95 x 7.95)
- 1ct Kyanite (Round, Blue, 6.15 x 6.15) vs. 1ct Benitoite (Emerald, Blue, 6.59 x 4.88)
- 1ct Kyanite (Round, Blue, 6 x 6) vs. 1ct Tanzanite (Round, Blue, 6 x 6)
- 1ct Kyanite (Round, Blue, 6.15 x 6.15) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 2.5ct Kyanite (Round, Blue, 8.34 x 8.34) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
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Actual size is currently adjusted to screen.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.
If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.