Egyptian blue was recently recreated using ancient methods: https://news.wsu.edu/press-release/2025/06/02/researchers-recreate-ancient-egyptian-blues https://n

Egyptian blue was recently recreated using ancient methods: https://news.wsu.edu/press-release/2025/06/02/researchers-recreate-ancient-egyptian-blues https://news.wsu.edu/press-release/2025/06/02/researchers-re... They look chemically quite different: clay, palygorskite/sepiolite, and indigo for Mayan blue; silica, lime, copper, and an alkali for Egyptian blue.