Obsidian is a resource in ARK that is used to make modern technology. Obsidian is obtained by harvesting black smooth rocks in caves and on mountains. Best way to harvest Obsidian is with a Ankylosaurus. If you do not have an Ankylosaurus a Metal Pick or a Mantis equipped with a metal pick in the tool slot.

Is an Anky good for obsidian?

Dododex and the game wiki both say the Anky is best, but the returns are just so pitiful. A 2:1 ratio of metal to obsidian from shiny black rocks on the volcano.

What is the best way to get obsidian in Ark?

The best ones to use are the Ankylosaurus, Magmasaur, and Phoenix due to their skillsets, and you can tame them using a single-player cheat code. You can also use a Mantis, or even a Metal Pick, but gathering obsidian will be faster if you go with one of the other creatures listed.