Dims: 3.5 x 3.5 x 2.2" (8.9 x 8.9 x 5.6 cm)
Wt: 8.15 oz. (231.2 g)
Pederneira, Sao Jose do Safira, Minas Gerais, Brazil
This rather odd specimen consists of several pseudohexagonal Albite blades that are held together by a muscovite matrix. The Albites are of the variety known as Cleavelandite, and are generally in good condition, as there are a few areas of visible damage. The largest of these blades has dimensions of 1.6 x 1.6" (4.1 x 4.1 cm), and like all of the others, shows a slightly warped form that still has well-defined edges and clean faces. All are colorless, transparent and moderately to dimly clear, and possess the standard pearly luster. The muscovite matrix is the strange aspect of this piece, as it consists of several rather heavily warped "books" of pseudohexagonal sheets that have partly intersected. Where they have been cleaved, one can see that the muscovite actually makes up a "core" in each book, which is surrounded by an outer layer of dark, brownish-pink lepidolite that grew off of the muscovite. The point on each book where the muscovite ends and the lepidolite begins is remarkably defined. There are also a few dark green elbaite crystals present, along with a very small amount of pyrite or another metallic sulfide.