Willemite
（重定向自Zinc orthosilicate）
![](/Images/godic/202502/22/Willemite_2_w-_franklinite_zinc_orthosilicate_Franklin_Sussex_County_New_Jersey_19011710.jpg")
![Willemite variety troostite from New Jersey](/Images/godic/202502/22/Willemite_2_variety_troostite_zinc_orthosilicate_Franklin_Sussex_County_New_Jersey_19071710.jpg")
![Crystal structure of willemite](/Images/godic/202502/22/Willemite1710.png")
Willemite is a zinc silicate mineral (Zn2SiO4) and a minor ore of zinc. It is highly fluorescent (green) under shortwave ultraviolet light. It occurs in all different colors in daylight, in fibrous masses, solid brown masses ("troostite"), and apple green gemmy masses.