Answer: DEBEERS

AnswerCrossword Clue
DEBEERSBig name in diamonds
DEBEERSCompany founded by Cecil Rhodes
DEBEERS"A diamond is forever" company
DEBEERSUsual Valentine's Day advertiser
DEBEERSSource of the Rhodes Scholarship endowment
DEBEERSDiamond miner
DEBEERS"A diamond is forever" sloganeer