Bidri is an art from Bidar, located in Karnataka, India. Bidri is a form of surface ornamentation in black colors, which never fades and is coated with silver and gold coverings.
Gunmetal, which is an alloy of Zinc and Copper is used for Bidri. The manufacturers use various moulds to give shape to the gun metal. Saline mud is kept out of sun light and air for almost 100 years and is used as oxidizing agent to give shine to the metal.
The Bidri designs are usually patterns such as the Asharfi-ki-booti, stars, vine creepers and stylized poppy plants with flowers. Traditional designs include the Persian Rose and passages from the Quran in Arabic script.
Flower vases, Cigar and Jewellery boxes and Huqqa buttons are the most sought after products of Bidri craft. Items like key chains, cuff links, paper weights, and paper knives are other Bidri craft which are used as gift articles.
For more information on this artwork, check http://en.wikipedia.org/wiki/Bidri