In Gems and the New Science: Matter and Value in the Scientific Revolution (U Chicago Press, 2026), Dr. Michael Bycroft argues that gems were connected to major developments in the “new science” between the sixteenth and nineteenth centuries. As he explains, precious and semiprecious stones were at the center of dramatic shifts in natural knowledge in early modern Europe. They were used to investigate luminescence, electricity, combustion, chemical composition, and more. They were collected by naturalists; measured by mathematicians; and rubbed, burned, and dissolved by experimental philosophers. This led to the demise of the traditional way of classifying gems—which grouped them by transparency, color, and locality—and the turn to density, refraction, chemistry, and crystallography as more reliable guides for sorting these substances.

The science of gems shows that material evaluation was as important as material production in the history of science. It also shows the value of seeing science as the product of the interaction between different material worlds. The book begins by bringing these insights to bear on five themes of the Scientific Revolution. Each of the subsequent chapters deals with a major episode in early modern science, from the expansion of natural history in the sixteenth century to the emergence of applied science early in the nineteenth century. This important work is not only the first book-length history of the science of gems but also a fresh interpretation of the Scientific Revolution and an argument for using a new form of materialism to understand the evolution of science.

This interview was conducted by Dr. Miranda Melcher whose book focuses on post-conflict military integration, understanding treaty negotiation and implementation in civil war contexts, with qualitative analysis of the Angolan and Mozambican civil wars. You can find Miranda’s interviews on New Books with Miranda Melcher, wherever you get your podcasts.

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