The Government of India has the sole right to mint coins. The responsibility for coinage vests with the Government of India in terms of the Coinage Act, 1906 as amended from time to time. The designing and minting of coins in various denominations is also the responsibility of the Government of India. Coins are minted at the four India Government Mints at Mumbai, Alipore (Kolkata), Saifabad(Hyderabad), Cherlapally (Hyderabad) and NOIDA (UP).Besides minting coins, the mints at Mumbai and Hyderabad also make coin blanks. Hyderabad, Mumbai and Kolkata mints have gold assaying facilities and the Mumbai mint produces standardised weights and measures. Commemorative coins are made at Mumbai and Kolkata. Kolkata has the facilities for making medallions too. The NOIDA mint was the first in the country to mint coins of stainless steel.
Some contemporary coins in general usage include the 5,1,2 rupee coins, and the 50,20,10 paise coins.
India brought out its distinctive coins on 15th August, 1950. The coins are issued for circulation only through the Reserve Bank in terms of the RBI Act. Coins are received from the Mints and issued into circulation through its Regional Issue offices /sub-offices of the Reserve Bank and a wide network of currency chests and coin depots maintained by banks and Government treasuries spread across the country. The RBI Issue Offices/sub-office are located at Ahmedabad, Bangalore, Belapur (Navi Mumbai), Bhopal, Chennai, Bhubaneshwar, Chandigarh,Guwahati,Hyderabad, Jammu, Jaipur, Kanpur, Kolkata, Lucknow, Mumbai, Nagpur, New Delhi, Patna andThiruvananthapuram. These offices issue coins to the public directly through their counters and also send coin remittances to the currency chests and small coin depots. There are 4422 currency chest branches and 3784 small coin depots spread throughout the country. The currency chests and small coin depots distribute coins to the public, customers and other bank branches in their area of operation. The members of the public can approach the RBI offices or the above agencies for requirement of coins.
For more detailed info on procedures and methodologies, visit: http://www.igmint.org/ http://mumbaimint.org/Story%20Of%20Coins.htm