With a variety of quality rock and mineral types represented in the cache—this point is made of obsidian—it is clear that its owner either traveled far to procure specific types of stone or ...

At over eight inches long and nearly one and a half pounds, this obsidian piece is the largest ... on NOVA's America's Stone Age Explorers website.

Some of the best elements to build with Stone include Sword, Sand, and Obsidian. To make these items, follow these instructions: Stone + Water = Rock Stone + Lava = Obsidian Obsidian + Stone ...