Anukruti posted an Question
October 17, 2020 • 16:58 pm 30 points
  • IIT JAM
  • Geology (GG)

Apart from kyanite ,does calcite show double hardness of 3 for all surface and 2 for parallel face?why kyanite is called diasthene?

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    Sajan sarthak

    KYANITE is having synonym diasthene due to dual hardness.

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    Sajan sarthak Best Answer

    Yes it shows...it has Hardness 3 you have studied it in Mohr hardness (only on the basal pinacoidal faces, calcite has a hardness of less than 2.5 and can be scratched by a fingernail)

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