Chalk: Revision history

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26 June 2019

  • curprev 21:3721:37, 26 June 2019‎ Admin talk contribs‎ 171 bytes +171‎ Created page with "{{Ore |name=chalk |freq=common |hardness=1 |density=2.5 |chemf=CaCO3 |calctemp=900 |calcprod=CaO |m1=Ca }} Chalk is a finely divided mineral form of calcium carbonate."
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