Andalusite (Var: Chiastolite)
Sterling, Worcester County, Massachusetts, USA
8.8 x 8.7 x 4.3 cm (largest). Mineral specimens of any variety from this old district are rare. This is a very fine and very rare 3-piece set of schist with andalusite (variety chiastolite) crystals which is andalusite containing cross-shaped inclusions of carbon. The sawed faces have been polished and sprayed with Krylon. These crystals are often ...
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