There are only few minerals that contain gold in their structure. The rare mineral Krennerite is one of them. Krennerite is a polymorph of Calaverite, and occurs in the same localities as Calaverite. They may even occur together on the same specimen. Krennerite was named in honor of Hungarian Mineralogist József Sándor Krenner (1839-1920), the curator of the Hungarian Mineral Museum.
Crystal Forms & Aggregates
In elongated prismatic crystals, and in short tabular crystals. Crystals are almost always striated lengthwise, and are usually small and in parallel or platy groupings. Also grainy, massive, and as coatings and crusts.
Environment
Low temperature hydrothermal replacement deposits.
Krennerite is a rare collector's mineral, with special value due to its gold content.
Noteworthy Localities
The type locality where Krennerite was first described is Sacarîmb (Nagyág), Hunedoara Co., Romania. Other localities for this rare mineral include the Emperor Mine, Vatukoula, Viti Levu, Fiji; and the Cripple Creek District, Teller Co., Colorado.
