page_title: Krennerite
hierarchical_section_title: Krennerite
caption_attribution_description: English: Krennerite Locality: Cresson Mine, Eclipse Gulch, Cripple Creek District, Teller County, Colorado, USA (Locality at mindat.org) Size: 3.0 x 2.7 x 2.5 cm. This rare gold silver telluride forms in some of the finest crystals in the world in the Cripple Creek Mining District. Fine crystals of Krennerite on matrix are virtually impossible to obtain anymore as the mines around Cripple Creek have long been defunct. This specimen features a few sharp, lustrous, platy, silvery colored crystals of Krennerite on Quartz matrix. These specimens are virtually impossible to obtain on the market these days. Deutsch: Krennerit Fundort: Cresson Mine, Eclipse Gulch, Cripple Creek District, Teller County, Colorado, Vereinigte Staaten (Fundort bei mindat.org) Größe: 3.0 x 2.7 x 2.5 cm.
context_page_description: Krennerite is an orthorhombic gold telluride mineral which can contain variable amounts of silver in the structure. The formula is AuTe₂, but specimen with gold substituted by up to 24% with silver have been found. Both of the chemically similar gold-silver tellurides, calaverite and sylvanite, are in the monoclinic crystal system, whereas krennerite is orthorhombic.
  The color varies from silver-white to brass-yellow. It has a specific gravity of 8.62 and a hardness of 2.5. It occurs in high temperature, hydrothermal environments.
  Krennerite was discovered in 1878 near the village of Săcărâmb, Romania, and first described by the Hungarian mineralogist Joseph Krenner.
context_section_description: Krennerite is an orthorhombic gold telluride mineral which can contain variable amounts of  silver in the structure. The formula is AuTe₂, but specimen with gold substituted by up to 24% with silver have been found ([Au0.77Ag0.24]Te₂). Both of the chemically similar gold-silver tellurides, calaverite and sylvanite, are in the monoclinic crystal system, whereas krennerite is orthorhombic.
  The color varies from silver-white to brass-yellow. It has a specific gravity of 8.62 and a hardness of 2.5. It occurs in high temperature, hydrothermal environments. 
  Krennerite was discovered in 1878 near the village of Săcărâmb, Romania, and first described by the Hungarian mineralogist Joseph Krenner (1839–1920).
caption: Krennerite in a quartz vein, Cresson Mine, Cripple Creek, Colorado
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