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← HistoryWhich mechanism impairs Mughal pietra dura inlay when groundwater table levels rise significantly?
A)Oxidation accelerates discolouration of gemstones
B)Efflorescence causes salts to crystallize✓
C)Bioerosion impacts embedded structural supports
D)Subsidence induces displacement of foundations
💡 Explanation
Increased groundwater causes efflorescence, where dissolved salts are drawn into porous inlay materials, leading to crystallization and spalling. This disrupts the aesthetic integrity because the crystallization pressure exceeds the stone's tensile strength, therefore causing damage, rather than simple oxidation or support issues.
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