David Alechenu Bonaventure Mark (bii ni Osu kerin Odun 1948) je ologun ti o ti fehinti ati oloselu omo orile ede Naijiria ti won dibo yan wole gege bi asoju Ipinle Benue ni ile igbimo asofin agba ti ile Naijiria.. 
Natural diamonds occur in the rock kimberlite, found in ancient volcanic "Necks", or "pípés" 