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Vaibhav Singh posted an Question
April 20, 2021 • 14:29 pm 30 points
  • IIT JAM
  • Geology (GG)

Can minerals with hardness >7 powder streak plate itself ???

Can minerals with hardness >7 powder streak plate itself ??? Because We know Minerals with hardness < 6 -7 get powdered on unglazed porcelain plate /streak plate . Will Minerals harder than Quartz (H=7) like Topaz ,Corundum ,Diamond make powder of streak plate itself????

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  • comment-profile-img>
    Sajan sarthak best-answer

    YES DEFINITELY THAT STREAK PLATE WILL IT SELF GROOVE OUT.

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    Shailesh Chaudhary Best Answer

    streak plate has hardness 6.5 approximately but the minerals with >7 hardness does not have streak on streak plate but they only scratch or fracture streak plate

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