B Beachwalker Well-Known Member Jul 5, 2018 #21 coreywebster said: Gypsum is calcium sulphate dihydrate Gym chalk is magnesium carbonate Click to expand... Thanks, I looked it up right after I posted it and deleted it
coreywebster said: Gypsum is calcium sulphate dihydrate Gym chalk is magnesium carbonate Click to expand... Thanks, I looked it up right after I posted it and deleted it
