Corporate gifts as Gold coin, silver coin, coins for investors, coins for building image brand, silver coin for sales promotion, gold coin for increasing sales, coins with company logo, silver coin as a gift, round gold coin, square gold coin, oval gold coin, round silver coin, round silver coin, square silver coin, oval silver coin 18k gold coin, 22k gold coin, 20k gold coin, 24k gold coin are tested for it's purity by a spectrum analysing machine, as in any Hallmarking process and certificate of purity is given by Manubhai Bhagwandas Jewellers Pvt. Ltd in Ahmedabad, India at low prices.