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Which of the following mineral is hardest?

Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/gypsum-1014151" style="font-weight:bold;" target="_blank" title="Click to know more about GYPSUM">GYPSUM</a> <br/>Calcite<br/><a href="https://interviewquestions.tuteehub.com/tag/topaz-710965" style="font-weight:bold;" target="_blank" title="Click to know more about TOPAZ">TOPAZ</a><br/>Diamond</p>Solution :Topaz</body></html>


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