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  1. Schwarz, Dietmar; Pardieu, Vincent; Saul, John M.; Schmetzer, Karl; Laurs, Brendan M.; Giuliani, Gaston; Klemm, Leo; Malsy, Anna-Kathrin; Erel, Eric; Hauzenberger, Christoph; Toit, Garry Du; Fallick, Anthony E.; Ohnenstetter, Daniel

    Rubies and Sapphires from Winza, Central Tanzania - Describes the mining and geology of this new source of untreated rubies, and characterizes the gem corundum produced there, which arrived on the market in early 2008

    Gems and gemology , 2008

    Enthalten in: Gems and gemology

    OLC Kunst und Kunstwissenschaft

  2. Schmetzer, Karl; Hanni, Henry A.; Bernhardt, Heinz-Jürgen; Schwarz, Dietmar

    Trapiche Rubies

    Gems and gemology , 1996

    Enthalten in: Gems and gemology

    OLC Kunst und Kunstwissenschaft