The Prima Materia is an item in Haunting Ground. Its appearance could only be described as "a combination of solid and liquid matter". To obtain the Prima Materia, Fiona must send Hewie through the bushes in the Graveyard (near the red cages room). Prima Materia is one of three components used in the creation of the White Godstone. It is used in the Extractor to create the Sulfuric Ore. It is symbolic of nigredo.