Dims: 11.4 x 5.5 x 4.0" (29.0 x 14.0 x 10.2 cm)
Wt: 7.3 lbs. (3.3 kg)
Sao Jose do Safira, Minas Gerais, Brazil
This cabinet specimen consists almost entirely of a variety of Albite called Cleavlandite that forms pseudohexagonal tabular blades. These blades are intensely intergrown, so it is very difficult to determine their average individual dimensions. Though there are several areas that show obvious damage, this damage is generally minor. The form of the blades is excellent- their edges are sharp and their faces are clean, and possess a bright, vitreous luster. All have a milky white coloration with a faint hint of blue and are individually translucent, though the crust itself is essentially opaque. Scores of elbaite tourmaline crystals are scattered on the Cleavlandite; most of these are less than 0.1" (3 mm) thick, but a few are much larger and more substantial than that. One in particular is thick enough to show an obvious difference in color between the material on its surface and that in its core (see the close-up image). I have only just examined the underside of this specimen, and have seen three large geometric depressions that show that this crust grew atop a few large crystals of some mineral. There are a few large elbaites there, too- one of these measures nearly 3" (7.5 cm) long and 0.2-0.4" (5-10 mm) thick.