Dims: 2.0" x 1.7" x 1.5" (5.1 x 4.3 x 3.8 cm)
Wt: 2.58 oz. (73.2 g)
Divino das Laranjeiras, Minas Gerais, Brazil
This specimen boasts several intergrown books of "star twin" Muscovite, which forms hexagram-shaped books through cyclic twinning. Other than their unusual shape, these books are just like any other Muscovite formations in the fact that they have a flaky consistency due to excellent basal cleavage, a pearly luster, and a greenish-yellow color. One of the books in particular shows considerable damage, but the rest are in very good or excellent condition. The albite host rock on which they grow is white and has a dull luster. It has crystalline tendencies, but shows no definite form.