Dims: 1.9" x 1.9" x 1.23" (4.8 x 4.8 x 3.0 cm)
Wt: 2.46 oz. (69.7 g)
Capelinha, Minas Gerais, Brazil
This specimen offers a "two-for-one" deal. Not only are there some superb Sphene crystals of near-gem-quality, but they are accompanied by several albite crystals with exceptional form. Though an entire face of the grainy host rock is covered with broken and incomplete crystals, the Sphenes that are intact show excellent form and no damage. They have a moderate yellow-green coloration and a bright, adamantine luster. All are transparent and somewhat clear, though their exteriors are heavily striated and their interiors show considerable internal fracturing. The two largest crystals have dimensions of about 0.4 x 0.3 x 0.1" (1.0 x 0.8 x 0.3 cm) and are the most noticeable. However, close examination will reveal that at their bases are clustered many tiny, prismatic crystals that have a slightly warped, diamond-shaped cross-section and a darker, almost forest-green coloration. These do not exceed 2 mm in length, and at least 10-power magnification is needed to effectively examine them. The albites are in close association with the Sphenes and are amazinly undamaged. They range in size from a few millimeters in any dimension up to 0.6 x 0.5 x 0.4" (1.5 x 1.3 x 1.0 cm), and show exceptional triclinic prismatic form. Their color is milky white and their luster is dull and waxy. The matrix upon which all of this rests seems to be made of tiny crystals of each mineral that were intermixed and compacted.