Prospect 7km SW of San Martin.
Ref.: Angelelli and Gordon (1948) Notulae Naturae Academy of Natural Sciences, Philadelphia: 205, 1-7.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 1073.