Sourcing the origins of carnelian in early Chinese civilizations - Meiting Yan; Jiancheng Liu; Chunlei Qin; Xuemei He; Xiaoguang Li; Jian Yu; Ruilin Mao; Hongye Han; Zhanwei Sun; Chong Wang; Zhenbin Xie; Honglin Ran; et al. (Proceedings of the National Academy of Sciences, 2026)