Black Tourmaline (Schorl) Dimensions: 10.0 x 4.6 x 2.9 cm (3.94 x 1.81 x 1.14 in)
A substantial black tourmaline specimen displaying a richly lustrous, jet-black surface and pronounced longitudinal striations. The elongated crystal consists of closely intergrown prismatic sections, creating a striking architectural form with deep parallel grooves and sharply reflective ridges.
Schorl is the iron-rich, black member of the tourmaline group, a family of complex borosilicate minerals recognized for their distinctive trigonal crystal structure. Its characteristic elongated prisms and strong vertical striations reflect the mineral's crystallographic growth, making black tourmaline one of the most recognizable minerals found in granitic pegmatites and other geological environments.
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