Acid Vs Marble. The hardness of marble vs. This acid etching can only be removed by professionally resurfacing and rehoning the stone. However sheltered areas on limestone and marble buildings and monuments show blackened crusts that have spalled peeled off in some places revealing crumbling stone beneath.
It is one of the most effective acid neutralization materials. Quartzite is quite different.
This black crust is primarily composed of gypsum a mineral that forms from the reaction between calcite water and sulfuric acid.
However sheltered areas on limestone and marble buildings and monuments show blackened crusts that have spalled peeled off in some places revealing crumbling stone beneath. The hardness of marble vs. However concrete acid stain possesses the unique property of creating a marble like effect without any additional staining techniques. In exposed areas of buildings and statues we see roughened surfaces removal of material and loss of carved details.
