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← HistoryWhich consequence results in ancient pietra dura inlay when seasonal temperature swings greatly exceed the mosaic's tolerance?
A)Individual tesserae fracture readily✓
B)Mortar experiences accelerating hydration
C)Efflorescence obscures design details
D)Oxidization accelerates color changes
💡 Explanation
Individual tesserae fracture because coefficients of thermal expansion differ, resulting in differential stresses exceeding material strength. Stress-induced brittle fracturing is the mechanism; therefore, tesserae crack, rather than mortar hydration promoting tesserae detachment.
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