obsidian hydration datinghttp://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31341202enGetty Institute2026-03-30 20:32:01http://AATesaurus.cultura.gencat.cat/aat/getty_enTesaurus d'Art i Arquitecturatext/html dating, obsidian hydration hydration ring dating obsidian dating obsidian-hydration dating