You can determine if an object is ceramic by examining its weight, thermal properties, acoustic resonance, and surface characteristics. True ceramics feel cool and heavy to the touch, exhibit a high resistance to scratching from steel blades, and produce a sharp, ringing sound when lightly tapped rather than a dull thud. Additionally, unglazed ceramic pieces typically reveal a porous, matte, earthen cross-section or bottom foot that distinguishes them from plastics, metals, and polished glass surfaces.
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