This is Exclusive GI Product of Karnataka.

Traditional metal handicraft of India, received the GI (Geographical Indication) in 2009
The black metal product of Bidari ware which is famous all over the country and the world, where the traditional tenant is tagged with Geographical Indication (GI). It is said that Bidar soil is very special. Warming Gifts, Anniversary Gifts, Ethnic Day Gifts, Birthday Gifts, Celebration Gifts, Traditional Occasions and they can be served as a gift on any joyous occasion or used as a good showpiece or table top This is a special type of soil which is available only in the unlit parts of the Bidar Fort. An important point is that all the process of starting the Bidderware from casting to oxidation is done by hand and is therefore time consuming. It is therefore also expensive. This product is 100% Made in India and handmade by skilled Artisans.
Process Of Making Bidriware -
The Bidriware undergoes an eight-stage process. The eight stages are moulding, smoothening by file, designing by chisels, engraving by chisel and hammer, pure silver inlaying, smoothening again, buffing and finally oxidising by soil and ammonium chloride. Bidriware is manufactured from an alloy of copper and zinc (in the ratio 1:16) by casting. The zinc content gives the alloy a deep black color. First, a mould is formed from soil made malleable by the addition of castor oil and resin. The molten metal is then poured into it to obtain a cast piece which is later smoothened by filing. The casting is now coated with a strong solution of copper sulphate to obtain a temporary black coating over which designs are etched freehand with the help of a metal stylus.