It's Banii Woven Banarasi Handloom Banarasi Silk Saree(Black)

A Banarasi saree is a saree made in Varanasi, a city which is also called Benares or Banaras. The saree are among the finest sarees in India and are known for their gold and silver brocade or zari, fine silk and opulent embroidery. The sarees are made of finely woven silk and are decorated with intricate design, and, because of these engravings, are relatively heavy.