Help recreating this mineral/stone/acid wash effect?!?

Please help used Muriatic Acid to clean blue stone was planing to seal after but every time it rains this white substance appears until cleaned with water : r/stonemasonry

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Please help used Muriatic Acid to clean blue stone was planing to seal after but every time it rains this white substance appears until cleaned with water : r/stonemasonry

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