Olive Oil Production by admin The olives are brought to the mill. The olives are poured into a hopper. The olives are conveyed up to a leaf and stem separator. The olives are washed. (Photo courtesy of Terra Creta.) The olives are crushed into a paste (then liquids & solids are separated). Organic olives are brought to Biolea’s traditional stone mill. At Biolea, granite millstones grind the olives into a paste. Biolea’s millstones are covered to reduce oxygen exposure. Stone milled olive paste is distributed onto pressing filters. A robotic arm lifts filters full of olive paste onto pressing carts. Olive oil and juices run down the sides during hydraulic pressing. The cold pressed fresh extra virgin olive oil is ready! Photographs by Lisa Radinovsky except where noted.