Dims: 1.9" x 1.8" x 1.0" (4.8 x 4.6 x 2.5 cm)
Wt: 2.19 oz. (62.1 g)
Capelinha, Minas Gerais, Brazil
Approximately 20 separate and distinct Albite crystals rest on the edge of the Sphene-laden host rock of this specimen. These crystals are in excellent condition, showing no damage, and range in size from less than 2 millimeters along any axis to 0.6 x 0.5 x 0.3" (1.5 x 1.3 x 0.8 cm). Even with their sometimes intense intergrowth, they all show excellent triclinic prismatic form that features well-defined edges and clean faces which show a pearly luster. All have a creamy-white coloration and are moderately-to-dimly translucent. The host rock on which they rest has an olive-green color that is caused by the fact that it is completely suffused with crystals of sphene. The size of the crystals ranges from the near-microscopic to one particular crystal with dimensions of 0.4 x 0.2 x 0.1" (1.0 x 0.5 x 0.3 cm). The smallest crystals have a deep, almost forest-green coloration which pales as their size increases. Most of the easily visible sphenes have very good monoclinic bladed form, and the largest shows definite twinning. The larger crystals show a high, adamantine luster that dims as their size decreases, and those that are trapped within the host appear to be positively dull.