Melonite - Gold, thin elongated crystals to The area in the middle is all Melonite across. The matrix is a pervasively silicified. This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
Cameronite: AgCu7Te10, Rickardite: Cu7Te5, Vulcanite: CuTe, Gray metallic massive cameronite showing subconchoidal fracture associated with purple rickardite and bronzy plates of vulcanite in a mass of tellurium. Good Hope mine, Vulcan District, Gunnison County, Colorado, USA.