(Jon of the Clue Crew holds a white rock at White Sands National Monument, New Mexico.)  Because it's water-soluble, this form of calcium sulfate is rarely found in sand, but here in New Mexico's Tularosa Basin, there are no rivers to carry it away, so it forms the famed white sand
[DOC] [TLE] White Sands, New Mexico - Cochise College P [PAR] White Sands National Monument is situated between the cities of Las Cruces and 
... Gypsum is a mineral compound called calcium sulphate dihydroxide, ... 
Gypsum is rarely found in the form of sand because it is soluble in water.