Visibly crystalline; generally as dense bands that coat quartz & is coated by white calite.
Quality of samples:
not specified / average specimens
Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 176 (Table 4); Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 57-59; Arizona Bureau of Mines file data.