.The Mineral Kyanite.


  •    Kyanite is a polymorph with two other minerals; andalusite and sillimanite. A polymorph is  a mineral  that shares the same chemistry but a different crystal structure with another.
  • it's colour is often blue, but also can be white, grey or green.
  • it's streak is white.
  • gravity is 3.58+.

    •                                                 by Colin Noseworthy
    pitcher of kyanite.
     
     
     

    Kyanite is a deep sapphire blue, green, gray, or
                                          white gemstone. The color is not always uniform;
                                           it can be blotchy or in streaks. The crystals
                                           are  transparent to translucent. Kyanite
                                           has a hardness of 4.5 to 6.5; the hardness varies
                                            depending on which way it is scratched (this
                                            happens because kyanite consists of long, thin
                                             crystals). It has a specific gravity of 3.58.
                                             Kyanite is found in Brazil, Burma, Kenya,
                                           Europe, India, Australia, Kenya, and the USA.
                                           Kyanite's chemical composition is Al2 SiO5; it is
                                              composed of andalusite and sillimanite.

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