Dims: 6.2 x 5.3 x 3.9" (15.7 x 13.5 x 9.9 cm)
Wt: 3 lbs., 6.4 oz. (1.542 kg)
Bancroft, Ontario, Canada
This cabinet specimen consists of at least 10 pseudohexagonal "books" of Biotite mica that are partly embedded in a calcite host. Most of these books are intergrown with each other and with masses of specular Biotite that make up a large percentage of the piece. The Biotite books are in good condition, though the largest one is damaged, and reach dimensions of 2.9 x 2.3" (7.4 x 6.6 cm). All but the largest have reasonably good form, with moderately well-defined edges and clean faces that possess the classic micaceous, pearly luster. They also possess the standard black color with golden highlights, and are essentially opaque at their present thicknesses. The pale-orange calcite host is noticeably sparse, and shows definite crystalline tendencies, if not any actual rhombohedral form. It is milky and translucent, and has a dull pearly-to-waxy luster.