20 Carat Kyanite (Oval, 21.41×14.27mm, Blue)
Color:
Actual size is set for screen
How big is a 20 carat oval-cut Kyanite?
It depends on the cut parameters and length-to-width ratio, but a typical size of a 20ct oval-cut Kyanite would be around 21.41×14.27 mm (±6%). The lw ratio of this Kyanite is 1.5. See below how big it looks on a ring and finger.
Ring:
Skin tone:
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Ring width:
3.0 mm
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Saved...
64 mm
| Your settings | |
|---|---|
Ring |
Gold |
Skin tone |
Light |
Ring diameter |
16.9 mm |
Ring width |
3.0 mm |
Finger length |
64 mm |
Finger coverage |
85 % |
|
Saved...
|
|
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Ring diameter:
16.9 mm
|
Additional Info
Kyanite got its name from the Greek word "kyanos", which simply means "blue". Gems with intense sapphire blue color are the most valuable. One peculiarity about Kyanite is that depending on crystallographic direction, it has two different hardnesses (7 and 4.5).
Where to buy?
For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile
Gem Details
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Name:
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Kyanite |
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Shape:
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Oval |
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Chemical Formula:
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Al2SiO5 |
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Crystal Structure:
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Triclinic |
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Hardness:
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4.5-7 |
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Specific Gravity
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3.68 |
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Carat weight:
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20 ct |
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Gram weight:
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4 g (0.1411 ounces) |
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Points:
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2000 pts |
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Length:
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21.41 mm |
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Width:
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14.27 mm |
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Est. face-up size:
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250.53 mm² |
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Volume:
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1086.96 mm³ |
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Length-to-width ratio:
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1.5 |
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Refractive Index:
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1.710 - 1.735 |
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Luster:
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Vitreous,Pearly |
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Wearability:
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Very good |
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Care Instructions:
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Should be treated gently |
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Color:
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Kyanite can be found in the following colors:
    
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Birthstone:
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Kyanite is not an official birthstone of any month |
Popular comparisons:
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 1ct Tanzanite (Oval, Blue, 8.07 x 5.38)
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 1ct Tanzanite (Oval, Light Blue, 7 x 5.38)
- 1ct Kyanite (Oval, Blue, 8 x 6) vs. 1ct Kyanite (Marquise, Blue, 10 x 5)
- 1ct Kyanite (Oval, Bluish Green, 8.14 x 6.14) vs. 1ct Alexandrite (Round, Bluish Green, 6.14 x 6.14)
- 1ct Kyanite (Oval, Blue, 7.77 x 5.18) vs. 2ct Tanzanite (Oval, Blue, 10.16 x 6.77)
- 5ct Kyanite (Oval, Blue, 13.31 x 8.87) vs. 5ct Tanzanite (Marquise, Blue, 18 x 9)
- 3ct Kyanite (Oval, Blue, 11.22 x 7.48) vs. 3ct Kunzite (Oval, Light Purple, 11.78 x 7.85)
- 1ct Kyanite (Oval, Blue, 8.14 x 6.14) vs. 1ct Alexandrite (Round, Light Green , 6.14 x 6.14)
Use the simulator on this page to play around with different ring and finger configurations.