Roger Lang - Americas: 31 Mar - 07 Apr 2019

Rio Grande do Sul, Brazil

San Juan de Rayas Mine, Guanajuato, Guanajuato Municipality, Guerrero, Mexico

Charcas, Charcas Municipality, San Luis Potosi, Mexico

Joplin Field, Jasper County, Missouri, United States of America

Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, United States of America

Linwood Mine, Buffalo, Scott County, Iowa, United States of America

Adams Mine, Eureka District, San Juan County, Colorado, United States of America

Pure Potential Mine, Silver District, La Paz County, Arizona, United States of America

Cabalango, Punilla Department, Córdoba, Argentina

Stanley Butte, Santa Teresa Mountains, Graham County, Arizona, United States of America

Batopilas, Batopilas Municipality, Chihuahua, Mexico

Minas Gerais, Brazil

Lake Valley, Sierra County, New Mexico, United States of America

Garfield Mine, Garfield, Mineral County, Nevada, United States of America

Planet Mine, Planet, La Paz County, Arizona, United States of America

Siglo XX Mine, Naica, Saucillo Municipality, Chihuahua, Mexico

Maybee, Monroe County, Michigan, United States of America

79 Mine, Chilito, Banner District, Gila County, Arizona, United States of America

Ojuela Mine, Mapimi, Durango, Mexico

San Diego Mine, Santa Bárbara, Santa Barbara Municipality, Chihuahua, Mexico

Sweetwater Mine, Ellington, Reynolds County, Missouri, United States of America

Ojuela Mine, Mapimi, Durango, Mexico

Milpillas Mine, Cuitaca, Santa Cruz Municipality, Sonora, Mexico

San Felipe Canyon, Aconchi, Aconchi Municipality, Sonora, Mexico

Cerro Huañaquino, Potosi Department, Bolivia

Tyrone Mine, Burro Mountains, Grant County, New Mexico, United States of America

Idarado Mine, Ouray, Ouray County, Colorado, United States of America

General Trimble's Mine, East Whiteland, Chester County, Pennsylvania, United States of America