title: Sassolite
text: Sassolite is a borate mineral, specifically the mineral form of boric acid. It is usually white to gray, and colourless in transmitted light.  It can also take on a yellow colour from sulfur impurities, or brown from iron oxides.
  
  History and occurrence
  
  Its mineral form was first described in 1800, and was named after Sasso Pisano, Castelnuovo Val di Cecina, Pisa Province, Tuscany, Italy where it was found. The mineral may be found in lagoons throughout Tuscany and Sasso. It is also found in the Lipari Islands and the US state of Nevada.  It occurs in volcanic fumaroles and hot springs, deposited from steam, as well as in bedded sedimentary evaporite deposits.
  
  See also
  
   List of minerals
   Borax
  
  References
  
  External links
  
  Borate minerals
  Triclinic minerals
  Luminescent minerals
  Minerals in space group 2