While you can find Obsidian on the right side of the map, the densest deposits are found on the left side. Moving Slightly upward to 60 Latitude and 20 Longitude, you can find another Obsidian ...

Natalie Behring for The New York Times Obsidian is among the most prized tool stones in the world, and this particular deposit, nearly 100 feet thick, is exceptional because of its continuous use ...

a famous sea cave once used as a private bathing location for the Roman emperor Tiberius, according to LiveScience. Obsidian deposits are found within several volcanic islands in the Mediterranean.