Obsidian is commonly found around volcanoes, mountains, snowy regions, and caves; bring a flying mount to reach deposits and carry your haul. An Ankylosaurus is a reliable land gatherer, while a Dunkleosteus can be especially effective on underwater deposits, and Magmasaurs are another strong option. Doedicurus may collect only stone from some obsidian rocks, so use it only on rocks that also yield metal; an Argentavis can help transport the harvested obsidian.