Schorl, Plagioclase, Quartz
Cumbres de Santa Ana, Alpachiri y El Molino, Chicligasta Department, Tucumán Province, Argentina
Tourmaline(Var:Schorl) Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)- Albite-Anorthite Series - Quartz SiO2.
Very nice sample of massive Schorl with 10.5 x 10 x 7.2 cm. Crystal has 5.5(length) x 2.3 x 1.7 cm.
From pegmatite near of pipeline service road of Alumbrera Mining, Cumbres de Santa Ana, Chicligasta Department, Province of Tucumán, ...