Dims: 3.7 x 3.6 x 2.4" (9.4 x 9.1 x 6.1 cm)
Wt: 15.3 oz. (433 g)
Poona, Maharashtra State, India
Part of a basalt vug contains several well-formed Apophyllite crystals. These crystals achieve dimensions of 0.9 x 0.5 x 0.5" (2.3 x 1.3 x 1.3 cm) and appeare to be in very good condition, as only a few are damaged. However, they are somewhat difficult to study, as most are at least partly intergrown with each other, and all are at least partly coated by clusters and sheaves of small stilbite crystals that have grown off of them. Even with this interference, all have excellent tetragonal prismatic form, with sharp edges and clean faces that possess the standard bright pearly luster. All are colorless, transparent and moderately clear, containing several basally-oriented internal cleavage planes and some cloudy inclusions. There are hundreds of the small stilbite crystals, almost all of which do not exceed 0.3" (8 mm) in length. They are in surprisingly good condition, as only a few are crushed, and line the inner surface of the basalt vug where there are no Apophyllites.