Entries - Gender: Does not Apply - Starting with M

The Mona Lisa Mine, located in Polk County on the ridge of Little Porter Mountain north of Gillham (Sevier County), was first opened in 1958 for the purpose of mining phosphate for agricultural fertilizers. Phosphate mining in other counties decreased the demand for mining from the Mona Lisa Mine, however, resulting in its closure sometime prior to 1963. In 1974, the property was discovered to contain turquoise. This discovery was made by property owner Jack McBride of Denver, Colorado (for this reason, it is sometimes referred to as the McBride Mine). Initial reports estimate that turquoise production of the McBride Mine totaled around 600 pounds. Much of the output of the McBride mine was dyed, stabilized, and compressed into cylinders …