Franklin Furnace is a famous mineral location for rare zinc, iron, manganese minerals in old mines in Franklin, New Jersey USA. This locale produced more species of minerals (over 300) and more different fluorescent minerals than any other location. The famous mineral association (assemblage) from Franklin includes willemite, zincite and franklinite. General Name, Symbol, Number zinc, Zn, 30 Chemical series transition metals Group, Period, Block 12, 4, d Appearance bluish pale gray Atomic mass 65. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7, 4, d Appearance silvery metallic Atomic mass 54. ... Franklin is a borough located in Sussex County, New Jersey. ... Minerals are natural compounds formed through geological processes. ... Fluorescence induced by exposure to ultraviolet light in vials containing various sized cadmium selenide (CdSe) quantum dots. ... Willemite is a zinc silicate (Zn2SiO4)and a minor ore of zinc. ... Zincite is the mineral form of zinc oxide (ZnO). ... Spinel is one of a group of minerals which crystallize in the isometric system with an octahedral habit, and whose chemical compositions are analogous. ...

Other rare minerals include esperite, clinohedrite, hardystonite, and others. There are scores of minerals found only here, such as Johnbaumite (an arsenous apatite), McGovernite, etc. Apatite is a group of minerals, usually referring to: hydroxylapatite, fluorapatite, and chlorapatite, named for high concentrations of OH-, F-, or Cl- ions, respectively, in the crystal lattice. ...

Sterling Hill is a few miles away and was part of the same ore body.