String of 31 beads of different shapes and colors, in the middle a piece of agate

This necklace has several beads with the biggest one in the middle being an agate. The large, dark grey beads are andesite, an igneous rock that is formed during volcanic eruptions. This is the same material that was used in the building of Hindu-Buddhist temples and statues in Central and East Java (8th-15th centuries). \According to the collector this string of beads was found in a grave in Krui…