▁descent . ▁The ▁original ▁N ama ▁and ▁K ho ik ho i ▁languages ▁are ▁spoken ▁in ▁only ▁a ▁few ▁remote ▁areas . ▁The ▁main ▁economic ▁activities ▁are ▁min ing , ▁and ▁fish ing ▁along ▁the ▁coast . ▁ ▁Some ▁of ▁the ▁more ▁prominent ▁towns ▁in ▁this ▁area ▁are ▁Spring b ok , ▁being ▁the ▁capital ▁of ▁this ▁region , ▁as ▁well ▁as ▁Klein ze e ▁and ▁K oi ing na as , ▁both ▁private ▁min ing ▁towns ▁owned ▁by ▁De ▁Be ers ▁Diam ond ▁M ines . ▁ ▁This ▁area ▁is ▁rich ▁in ▁all uv ial ▁diam onds , ▁depos ited ▁along ▁the ▁coast ▁by ▁the ▁Orange ▁River . ▁O ran jem und ▁is ▁another ▁min ing ▁town ▁along ▁this ▁coast , ▁situated ▁in ▁Nam ib ia , ▁but ▁very ▁much ▁on ▁the ▁border . ▁As ▁the ▁name ▁suggests , ▁it ▁is ▁at ▁the ▁mouth ▁of ▁the ▁Orange ▁River ▁which ▁forms ▁the ▁border ▁between ▁South ▁Africa ▁and ▁Nam ib ia . ▁The ▁town ▁of ▁Alexander ▁Bay ▁is ▁located ▁on ▁the ▁opposite ▁side ▁of ▁the ▁river ▁mouth ▁( i . e . ▁in ▁South ▁Africa ) ▁and ▁is ▁linked ▁to ▁O ran jem und ▁by ▁the ▁Ernest ▁O ppen heimer ▁Bridge . ▁Other ▁links ▁crossing ▁the ▁river ▁further ▁up stream ▁are ▁a ▁re int rodu ced ▁p onto on ▁at ▁Send el ings d rift ▁in ▁the ▁Rich ters vel d ▁National ▁Park , ▁and ▁road ▁brid ges ▁at ▁V io ols dr if ▁( the ▁main ▁border ▁crossing ▁between ▁the ▁two ▁countries )