BINH THUAN, Nov 19 (Bernama) -- A set of stone musical instrument dating from 3,000 years ago was unearthed by a farmer in Da Kai commune, Duc Linh district, when he dug holes for planting coffee trees, according to Vietnam news agency on Friday. The music instrument comprises of five slabs of black blue stone, which when arranged from small to big form a trapezoid. This is a typical character of ancient lithophone, different from new lithophones or sounding stone slabs. The instrument has been handed over to the Binh Thuan museum. Earlier, the Binh Thuan museum in coordination with...