ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY
A crystal of pink apatite growing on an aggregate of albite crystals. The name apatite refers to a number of minerals of different compositions, including various metal phosphates, arsenates and vanadates. Albite (sodium aluminium silicate) is colourless or white and forms two different types of crystal; the prismatic variety seen here (known as pericline) and a lamellar (plate-like) variety (known as cleavelandite). This specimen measures 3.5 x 2.5 cm and was found in Itatiaia's Mine, Conselheiro Pena, Brazil.
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