Duftite (Type Locality) on Dolomite casts (old - classic locale) Cook Coll.

Item Description

RARE, colorful and sculptural large casted combination from famed Tsumeb. Green Duftite dramatically coats the striking, 3-dimensional dense thin crust of dolomite casts after opposing lenticular Calcite rhombohedrons. The colorful powder-blue area, adding more contrast, is probably Plancheite, a rare secondary copper silicate. The lightweight piece weighs only 40 grams. Tsumeb is the Type Locality for Duftite, a Pb-Cu-arsenate and is generally considered to be the world's greatest specimen producing mine. Dolomite casts of this quality came out in the late 1970s. Ex Cook Collection. We feel very lucky to have picked up the large collection of Bill and Anne Cook of Cleveland, recently. It is a tribute to their long efforts, how many interesting minerals and old localities were preserved and carefully labelled so you can see them now. Bill and Anne collected for at least 60 years. An exceptional and rare dolomite cast with duftite with two fine display views.