is named after Pollux, twin brother of Castor in classical mythology, in allusion to its ultimate association with the mineral “castorite”, now renamed as petalite.Pollucite forms transparent colourless cubes, dodecahedra or trapezohedra and it may also occur as fine-grained masses.
Pollucite is transparent and colorless and is remarkable as one of the few colorless gemstones with a single refractive index (1.52) between 1.50 and 1.70. Pollucite is a keenly collected gemstone species.
