Dims: 0.6" x 0.5" x 0.5"(1.5 x 1.3 x 1.3 cm)
Wt: 4.2 g
Colatina, Espirito Santo, Brazil
A crystal from the famous Espirita Santo locality in Brazil, this specimen is in the form of a cyclic twin, or trilling. It looks a lot like a double-terminated hexagonal crystal of a dull yellow-green mineral. It has a pearly luster and shows heavy striating, especially on its termination faces. There is a band of cloudy translucence running through the center of the crystal's prism and the material towards both terminations clears to transparent, but this transparence is interrupted by both internal fractures and heavy inclusions. Though some striations are so heavy as to become crevices in the crystal, there is almost no detectable damage.