2ct Kyanite (Marquise, 12.78×6.39mm, Blue) vs 2ct Diamond (Round, 8.19×8.19mm, White)
Quick summary: When looked from above (face-up position), 2ct Kyanite (12.78×6.39mm, marquise cut) appears 10% larger than 2ct Diamond (8.19×8.19mm, round cut). See below how they compare side-by-side on a ring and finger.
| 2ct Kyanite (marquise cut) |
vs
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2ct Diamond (round cut) |
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blue |
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| 12.78×6.39 mm | 8.19×8.19 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
2ct Kyanite Marquise (12.78×6.39mm, Blue)
and
2ct Diamond Round (8.19×8.19mm, 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.
| 2 Ct Kyanite (Marquise) | 2 Ct Diamond (Round) | |
| 12.78×6.39 mm | vs | 8.19×8.19 mm |
| 57.98 mm² | 52.68 mm² |
| 2ct Kyanite Marquise (12.78×6.39mm) | |
| 2ct Diamond Round (8.19×8.19mm) | |
| Difference: 10% (5.3 mm²) |
2ct Kyanite (Marquise, 12.78×6.39mm) has approx. 10% more face-up area than 2ct Diamond (Round, 8.19×8.19mm).
Popular comparisons:
- 2ct Kyanite (Marquise, Blue, 12.78 x 6.39) vs. 5ct Ruby (Round, Red, 10.22 x 10.22)
- 5ct Kyanite (Marquise, Blue, 17.36 x 8.68) vs. 5ct Tanzanite (Marquise, Blue, 18 x 9)
- 10ct Kyanite (Marquise, Dark Bluish Green, 21.86 x 10.93) vs. 10ct Emerald (Marquise, Green, 24.24 x 12.12)
- 1ct Kyanite (Marquise, Blue, 10.14 x 5.07) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 1.5ct Kyanite (Marquise, Blue, 11.62 x 5.81) vs. 2ct Diamond (Round, White, 8.19 x 8.19)
- 2.5ct Kyanite (Marquise, Blue, 13.78 x 6.89) 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)