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Which deterioration process diminishes intricate pietra dura inlay work?

A)Differential thermal expansion cracking
B)Galvanic corrosion of metal supports
C)Erosion from airborne particulate matter
D)Microbial growth within porous stones

💡 Explanation

Differential thermal expansion causes cracking, as each inlaid stone expands and contracts differently with temperature changes, because the coefficients of thermal expansion vary. Stress fractures in the weaker mortar therefore propagate, rather than uniform expansion, which would preserve the bonding.

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