Gold is a chemical element with symbol Au and atomic number 79, making it one of the higher atomic number elements that occur naturally. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. BIS stands for Bureau of Indian Standard. It is an agency solely operated by government of India. BIS is basically used to provide certification to jewelers under the BIS Act, Rules and Regulations, based on which they can sell BIS certified Hallmark jewelry which ensures the quality of Gold Jewelry as per BIS criterion. The BIS hallmark is a hallmarking system for gold as well as silver jewellery sold in India certifying the purity of the metal.[1][2] It certifies that the piece of jewellery confirms to a set of standards laid by the Bureau of Indian Standards, the national standards organization of India. India is the second biggest market for gold and its jewellery. Please visit www.alephindia.in to know more. AlephINDIA: A single window for all kind of technical certifications and testing equipment. BIS, WPC, ETA, BEE, Ewaste, CE, UL, FMCS, CPCB, CARE, ISIMark, Hallmark.