Andalusite
Bluebird Kyanite Mine, Vitrefrax Hill, Obregon, Cargo Muchacho Mining District, Cargo Muchacho Mountains, Imperial County, California, USA
2.2 x 1.8 x 1.2 cm. A rare, sharp and sharply terminated, dipyramidal, orthorhombic, mottled gray to pink andalusite crystal thumbnail with greasy lustre from this obscure extinct California Au-kyanite-mica mine, that operated from 1926-46 (MINDAT). The kyanite was used for refractory cement products. This is an outstanding and very rare sharp and ...
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