Basalt

A dense, hard, dark brown-to-black volcanic igneous rock, consisting of feldspar and mafic minerals such as augite or olivine.

Works of Art

A dense, hard, dark brown-to-black volcanic igneous rock, consisting of feldspar and mafic minerals such as augite or olivine.

Works of Art

c. 17th–7th century B.C.E.

1970

c. 50–250 C.E.

c. 1500

1792–1750 B.C.E.

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