Dims: 1.6 x 1.3 x 1.0" (4.1 x 3.3 x 2.5 cm)
Wt: 24.0 g
Brumado Mine, Bahia, Brazil
This thumbnail specimen consists of a cluster of heavily intergrown trigonal Magnesite rhombohedrons. These crystals have dimensions that do not exceed 1.0 x 0.5 x 0.4" (2.5 x 1.3 x 1.0 cm) and are in good condition, though several show noticeable damage and the largest is not quite complete. Where intact, however, they have excellent form, with sharp edges and clean faces that possess a bright vitreous luster. They are colorless, transparent, and moderately to dimly clear due to cloudy inclusions, intergrowth, and internal fracturing along their cleavage planes. Amidst the Magnesites stands a single hexagonal prismatic quartz crystal that is undamaged and shows excellent form. It is colorless, transparent, and has the standard vitreous luster. It does appear to have a slightly rusty coloration, but this is due to a thin film of rust that lies between the quartz crystal and the partly intergrown Magnesites. One of these extends an impressive distance into the quartz crystal, and is easily seen through its prism faces. There is no host rock present.