Occurs as nodules as an alteration product of pyrite.
Colour:
Yellow
Quality of samples:
not specified / average specimens
Confirmation
Validity:
Believed Valid
References
References:
Cleve (1870) Ak. Stockholm, Handl.: 9 [12]: 31; 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: 604.