Stone has been used to make music for thousands of years. Some of the earliest playing of music involved the striking of rocks. Ringing rocks have been discovered on various sites across Ethiopia.  The earliest forms of tuned percussion are to be found in Lake Tana Islands. Similarly,  Mysterious Stones Found In Lake Tana. May Have Been ancient Musical Instruments.  stones are clearly shaped by human hands. One of them has been dated as more than 5,000 years old. Monks assumed they were tools, but they hadn't found hard evidence for it. You can found in the church of Ethiopia inside lake tana island the stone boats.

The use of stone bells, known as dowel has been adapted for Christian use in the Coptic church and can be heard, for example, at one of the monasteries on an island in the middle of Lake Tana.  They hang from a rope and are apparently used functionally, as, for example, a dinner gong.