▁mine . ▁ ▁M ines ▁The ▁mines ▁owned ▁and ▁operated ▁by ▁Deb sw ana ▁are : ▁Diam ond ▁mines : ▁O rap a ▁diam ond ▁mine , ▁opened ▁in ▁ 1 9 7 1 ▁Let l h ak ane ▁diam ond ▁mine , ▁opened ▁in ▁ 1 9 7 5 ▁J wan eng ▁diam ond ▁mine , ▁opened ▁in ▁ 1 9 8 2 ▁D amt sh aa ▁diam ond ▁mine , ▁opened ▁in ▁ 2 0 0 3 ▁Co al ▁mine : ▁Mor up ule ▁Col li ery , ▁opened ▁in ▁ 1 9 7 3 ▁ ▁History ▁ ▁Deb sw ana ▁was ▁formed ▁as ▁the ▁De ▁Be ers ▁B ots w ana ▁M ining ▁Company ▁on ▁June ▁ 2 3 , ▁ 1 9 6 9 , ▁after ▁De ▁Be ers ▁ge olog ists ▁identified ▁diam ond - b ear ing ▁depos its ▁at ▁O rap a ▁in ▁the ▁ 1 9 6 0 s . ▁Over ▁the ▁next ▁five ▁years , ▁the ▁government ▁of ▁B ots w ana ▁increased ▁its ▁ownership ▁st ake ▁from ▁an ▁original ▁ 1 5 % ▁to ▁a ▁full ▁ 5 0 %. ▁On ▁March ▁ 2 5 , ▁ 1 9 9 2 , ▁the ▁name ▁of ▁the ▁company ▁was ▁changed ▁to ▁Deb sw ana ▁Diam ond ▁Company ▁( Prop ri et ary ) ▁Ltd . ▁The ▁company ’ s ▁primary ▁objective ▁is ▁diam ond ▁min ing ▁and ▁associated ▁processes . ▁Deb sw ana ▁oper ates ▁the ▁O rap a , ▁Let l h ak