Petrification is a process, but it also can be understood as a concept. This volume takes the first steps to manifest, materialize or “petrify” the concept of “petrification” and turn it into a tool for analyzing material and social processes. The wide array of approaches to petrification as a process assembled here is more of a collection of possibilities than an attempt to establish a firm, law-generating theory. Divided into three parts, this volume’s twenty-plus authors explore petrification both as a theoretical concept and as a contextualized material and social process across geological, prehistoric and historic periods.