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Vaibhav singh Asked a Question
April 20, 2021 8:59 ampts 30 pts
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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  • Sajan sarthak thankyou
    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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