Rock crystal is among the most fascinating materials in the archaeological record. It is formed in alpine-type fissures by hydrothermal processes. Due to its physical properties, rock crystal has been a valuable resource throughout human history. In alpine regions, it was frequently used for the production of stone tools between the Mesolithic and the Bronze Age. However, there are only a handful of known prehistoric crystal quartz quarries in Europe. The following article presents evidence for rock crystal mining during the Early Mesolithic and the final stage of the Neolithic at a high-altitude site in the Canton of Valais, Switzerland. In combination with radiocarbon dates from previous studies, the results of our fieldwork indicate that in the Swiss Alps rock crystal was mined almost 10,000 years ago. Furthermore, typo-technological analyses provide new insights into the way in which the raw material was processed during the represented time periods.

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