Kyanite (Green) 26 to 42mm. Briolette Marquise (SD) Shape "AB" Grade 9 Inch Bead Layouts ITEM#4825-29071 PRODUCT DETAILS    Stone/Shape: --    Stone/Color: --    Bead Cut: Briolette    Size: 26 to 42mm.  Approx    Weight (pcs.): 181.20 carat. Approx    Origin: Africa    Color: AAA    Clarity: MI (Moderately Included)    Treatment: None    Length: 9 Inch    Overall Grade: "AB" Price per layout. $285.39

Kyanite (Green) 26 to 42mm. Briolette Marquise (SD) Shape "AB" Grade 9 Inch Bead Layouts 20 % off

Price
$285.39 PER layout.

Kyanite 13x10mm. Oval Shape "AAA" Color Super Bargain Gems ITEM#4825-27755 PRODUCT DETAILS    Stone/Shape: --    Stone/Color: --    Cut: Regular    Size: 13x10mm.  Approx    Origin: Nepal    Color: AAA    Clarity: MI (Moderately Included)    Treatment: None Price per carat. $25.11

Kyanite 13x10mm. Oval Shape "AAA" Color Super Bargain Gems 20 % off

 

Price
$25.11 PER carat.

Kyanite (Royal Blue) 18 to 33mm. Briolette Marquise (SD) Shape "AB" Grade 9 Inch Bead Layouts ITEM#4825-29052 PRODUCT DETAILS    Stone/Shape: --    Stone/Color: --    Bead Cut: Briolette    Size: 18 to 33mm.  Approx    Weight (pcs.): 173.40 carat. Approx    Origin: Africa    Color: AAA    Clarity: MI (Moderately Included)    Treatment: None    Length: 9 Inch    Overall Grade: "AB" Price per layout. $273.11

Kyanite (Royal Blue) 18 to 33mm. Briolette Marquise (SD) Shape "AB" Grade 9 Inch Bead Layouts 20 % off

 

Price
$273.11 PER layout.

Kyanite 6x4mm. Oval Shape "AA" Color Super Bargain Gems ITEM#4825-27744 PRODUCT DETAILS    Stone/Shape: --    Stone/Color: --    Cut: Regular    Size: 6x4mm.  Approx    Origin: Nepal    Color: AA    Clarity: SI (Slight Inclusions)    Treatment: None Price per carat. $5.02

Kyanite 6x4mm. Oval Shape "AA" Color Super Bargain Gems 20 % off

 

Price
$5.02 PER carat.

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While ranging from light to dark blue hues, kyanite is unique because the gem often forms its color in the center of the stone and tends to be colorless at the edges. With a Mohs’ Hardness of 7 in general but only about 4.5 along its axes, plus a marked cleavage that parallels the prism face, kyanite is a challenge to cut.

Kyanite exhibits a pleochroism in three directions consisting of violet-blue, colorless and cobalt blue. The main sources for gem quality kyanite include Burma (Myanmar), Brazil, Kenya, Austria, Switzerland, Zimbabwe, and the United States.

Kyanite has a similar chemical composition to andalusite and fibrolite but it has a different crystal structure. It exhibits a range of colors including blue to colorless, blue-green and brown. On Mohs’ scale of Hardness, kyanite ranks about 4.5 along its axes but a tougher 7 in general. It has a vitreous luster, and primary sources includes Burma (Myanmar), Brazil, Kenya, Austria, Switzerland, Zimbabwe, and the United States. Kyanite exhibits a range of colors including blue to colorless, blue-green and brown.

Color: blue, greenish blue, yellow, pink, colorless
Hardness: bi-directional, 4.5 – 7
Refractive index: 1.71 – 1.74
Density: 3.53 – 3.70
Chemical composition: Al2O[SiO4]
Crystal structure: triclinic
Origins: Tibet, Brazil, USA, Switzerland, Kenya, Mozambique, Russia, Nepal, India, Burma.
 

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