The Black Stone is located in Žibikai pine forest, Viekšniai eldership. This boulder is 0.22 km northeast of the Viekšniai–Pievėnai and Viekšniai–Tiršliai crossroads, about 0.2 km northeast of the village cemetery. Stone with a flat surface, irregular oval shape, 5.59 m long, 3.76 m wide, 1.89 m high, perimeter: 15.25 m. The stone contains a lot of minerals. The stone was declared a natural monument in 1964, and it is also an archeological monument.