Arfvedsonite, zircon, fergusonite-(Y), orthoclase

Mount Malosa, Zomba District, Malawi

Reference: 1341

Nice combination specimen that is both aesthetic and rare. On a matrix of finely formed othoclase crystals are black lustrous arfvedsonite crystals between which are finely formed crystals of zircon (8mm across) and fergusonite-(Y) (up to 7mm across).

Formulas: Arfvedsonite [Na][Na₂][Fe²⁺₄Fe³⁺]Si₈O₂₂(OH)₂; Zircon ZrSiO₄; Fergusonite-(Y) YNbO₄; Othoclase KAlSi₃O₈