41. Ferberite typically occurs in pegmatites , granitic greisens, and high temperature hydrothermal deposits. 42. It has also been reported from a pegmatite complex in Florence County, Wisconsin. 43. It occurs as a secondary mineral in pegmatite . 44. It occurs in pegmatites in a pyroxenite intrusion as crystals in clinochlore and kassite. 45. It forms from the oxidation of ferberite within granitic pegmatite lattice ( A2B2O6O ). 46. Pegmatites are noted for very large crystal size.47. It occurs as metasomatic replacement in granitic pegmatites and within phosphatic nodules in shales. 48. Common types are pegmatites , aplites and elvans. 49. Margaret then notes that there are tourmaline-bearing and beryl-bearing pegmatites . 50. The mineral occurs in pegmatite deposits and is easily mistaken for albite and other feldspars.
