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 of 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 which served as a major factor for re-introducing this ancient craft in India. During the Vedic ages, the gold embroidery was associated with the grandeur and regal attire of gods, kings, and literary figures (gurus){as shown in the movies}. Today in most fabrics, zari is not made of real gold and silver, but has cotton or polyester yarn at its core, wrapped by golden/ silver metallic yarn. - Wikipedia"