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LiveScience
LiveScience
Tom Metcalfe

Chiseled obsidian recovered from Neolithic shipwreck near Capri's 'Blue Grotto'

Capri Sean Kingsley Italy Naples Tiberius Police
A scuba diver with a flashlight approaches a large piece of obsidian on the seafloor.

Divers from Naples, Italy have recovered a block of obsidian from the remains of what is likely a Neolithic, or New Stone Age shipwreck near the island of Capri.

The natural-glass block is about the size of a very large book and weighs almost 17.6 pounds (8 kilograms). There are visible signs of chiseling on its surface, and archaeologists think it was an obsidian "core" that would have been used to make sharp-edged flakes for cutting.

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