It is believed that Sanskrit language was recognized by the drumbeats of the damaru (see Shiva Sutra for the sounds), and his performance of the cosmic dance of tandava.Symbolically, the creation of the world begins when the lingam and yoni meet at the midpoint of the damaru, and the destruction takes place when they separate from each other.[citation needed] In the post-Mauryan period a tribal society at Kosambi (modern Allahabad district) made cast copper coinage with and without punchmarks.A collar of simple brocade, or copper or silver, has a hand-hold, and is the site of attachment of the beaters, whose knit cover represents two eyeballs.Today, India is no longer a source, and their creation and export from Nepal are banned, because of the acquiring of human bone through illegal practices.Usually featuring only a thin veneer of varnish, so that the grain of the wood shows, they come the common red (marpo), black (nakpo) or rare yellow (serpo) type of acacia, and are very occasionally painted with skulls, the eight charnel grounds, or other symbols.The above applies to the ideal manufacture of the damaru, and as still described in the definitive modern work, the "Mindroling Handbook of Vajrayana Implements".Those manufactured in India and Nepal are made of indeterminate and cheap woods, with painted skins, often no interior mantras, and altogether deviating from the many other essentials, as prescribed in technical literature such as the Mindroling Handbook.
Two Damaru-shaped coins from the Gangetic Valley
Drum damaru – the Asia and Pacific Museum in Warsaw