Quartz | Properties, Varieties, Occurrence and Uses
From Brazil, in large amounts from many localities in Rio Grande do Sul, Minas Gerais, Goilas, and Bahia. Around Artigas, Uruguay. At Thunder Bay, Lake Superior, Ontario, Canada. In the USA, from Mt. Ida to Hot Springs, Ouachita Mountains, Arkansas; at Middleville, Herkimer Co., New York; in North Carolina, especially in Alexander and Lincoln Cos.