Mineral Specimen #4842 Yellow Smithsonite
Wenshan, Yunnan Province, China
Something new, bright yellow Smithsonite from China reminiscent of the classic material from Sardinia. This specimen and a few others were featured in the show report on mindat from the recent Denver show which can be seen by clicking here . At one end f this specimen, there is a rounded knob of the yellow Smithsonite. Also, there are layers of green Smithsonite. There are places where a thin crust of bright orange material is present. This is possibly Greenockite (or possibly just iorn oxides). The yellow is a layer between 4 and 5 mm thick above a layer of white Smithsonite between 7 and 8 mm thick. The yellow surface of the specimen has a dull luster although from the side, both colors of Smithsonite exhibit good luster. The white material has a better luster especially where it is not covered with the yellow materail on one side of the specimen. Like yellow Smithsonite from other locations, the color is likely due to micro inclusions of Cadmium likely in the form of Greenockite. One piece of evidence for this assumption is indicated by how bright the yellow is when photographed with a digital camera which necessitates decreasing the saturation in the photos to realistically portray the specimen. This has been the same case with yellow Smithsonite with included Greenockite from Arkansas, Mexico and Ireland. There are sulfides in small amounts present in the gray matrix.
Flaws: There is some chipping in a few places along edges of the Smithsonite.
11.6 x 6.2 x 3.7 cm
This mineral is also found in the following galleries: Minerals From China | Carbonates | Minerals Priced Between 200 and 299 Dollars