Zari

Zari is an even thread traditionally made of fine gold or silver used in traditional Indian, Bangladeshi and Pakistani garments, especially as brocade in saris etc. This thread is woven into fabrics, primarily silk, to make intricate patterns and elaborate designs of embroidery called zardozi. Zari was popularised during the Moghul era; the port of Surat was linked to the Meccan pilgrimage route w... (Wikipedia)