, ▁credit ▁card ▁companies ▁usually ▁have ▁a ▁" g old ▁card " ▁and ▁a ▁" pl atin um ▁card " ▁( many ▁formerly ▁had ▁a ▁" sil ver ▁card " ▁then ▁followed ▁by ▁a ▁" g old ▁card ", ▁but ▁due ▁to ▁similarity ▁in ▁appearance ▁between ▁silver ▁and ▁plat in um ▁these ▁were ▁often ▁dis cont in ued ▁with ▁the ▁rise ▁in ▁popular ity ▁of ▁plat in um ▁as ▁a ▁pre cious ▁metal ). ▁ ▁Sports ▁events ▁have ▁a ▁well - est ab lished ▁convention ▁( int rodu ced ▁into ▁the ▁Olympic ▁tradition ▁at ▁the ▁ 1 9 0 4 ▁Summer ▁Olympics ), ▁of ▁a ▁hierarchy ▁of ▁med als : ▁bronze ▁medal ▁- ▁silver ▁medal ▁- ▁gold ▁medal . ▁This ▁pres umably ▁echo es ▁conventional ▁coin age ▁systems , ▁in ▁which ▁cheap ▁bronze ▁or ▁co pper ▁denomin ations ▁could ▁aggregate ▁to ▁intermediate ▁silver ▁co ins , ▁then ▁to ▁gold ▁money . ▁The ▁arch et yp al ▁British ▁design ations ▁( pen ny , ▁sh illing ▁and ▁p ound ) ▁parallel ▁and ▁reflect ▁this ▁hierarchy . ▁ ▁Events - sp ons or ship ▁in ▁sport ▁or ▁in ▁the ▁arts ▁may ▁involve ▁( for ▁example ) ▁silver , ▁gold ▁and / or ▁plat in um ▁spons ors . ▁ ▁Fant asy ▁role ▁playing ▁games ▁often ▁have ▁a ▁hierarchy ▁of ▁materials , ▁following ▁the ▁relative ▁strength s ▁of ▁pre - mod ern ▁met als , ▁bronze , ▁iron ▁and ▁steel , ▁for ▁example , ▁at ▁the ▁lower ▁end , ▁and ▁moving ▁up ▁through ▁fant astic ▁or