GK Power, a Seoul-based smart card maker and online game provider has developed diamond-embedded credit cards . GK Power started sales for the luxury cards to local and overseas banks last year. Recently, it signed a $175,000 contract with Dubai First Bank in September to supply 1,000 cards - worth 300 times more than conventional plain plastic cards - for the bank's most valued clients.
Currently, BC's ``Diamond Card,'' Hyundai Card's ``The Black'' and Woori Bank's corporate cards are some of the local institution's using GK Power's high-concept cards.
