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Rock Climbing and Bouldering: The Advantages of Magnesium Carbonate Ch – Szent Climbing
TIL climbing chalk absorbs water at the molecular level, going from magnesium carbonate MgCO₃ to what chemists call "hydrated", but still dry-to-the-touch, hydromagnesite Mg₅(CO₃)₄(OH)₂·4H₂O. : r/bouldering