Enargite from Slovakia

Enargite is a copper arsenic sulfosalt mineral with formula: Cu₃AsS₄. Enargite is a steel gray, blackish gray, to violet black mineral with metallic luster. It forms slender orthorhombic prisms as well as massive aggregates. It has a hardness of 3 and a specific gravity of 4.45. It is a medium to low temperature hydrothermal mineral occuring with quartz, pyrite, as well as other copper sulfides. It occurs in the mineral deposits at Butte, Montana, San Juan Mountains, Colorado and at both Bingham Canyon and Tintic, Utah. It is also found in the copper mines of Mexico, Argentina, Chile, Peru, and the Philippines. Image File history File links locality: Slovakia: DobÅ¡iná, Slovenské rudohorie sk: Slovensky: enargit Cu3AsS4 Source: http://www. ... Image File history File links locality: Slovakia: DobÅ¡iná, Slovenské rudohorie sk: Slovensky: enargit Cu3AsS4 Source: http://www. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ... General Name, Symbol, Number arsenic, As, 33 Chemical series metalloids Group, Period, Block 15, 4, p Appearance metallic gray Atomic mass 74. ... Sulfosalt minerals are those complex sulfide minerals with the general formula: AmBnSp; where A represents a metal such as copper, lead, or silver; B represents a semi-metal such as arsenic, antimony or bismuth; and S is sulfur or rarely selenium. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... Hydrothermal circulation in the oceans is the passage of the water through mid-ocean Ridge (MOR) systems. ... Quartz is the second most abundant mineral in the Earths crust. ... The mineral pyrite, or iron pyrite, is iron disulfide, FeS2. ... Butte, Montana Butte is a city that is located in Silver Bow County, Montana and is the county seat. ... The San Juan Mountains are a rugged mountain range in southwestern Colorado. ... Colorado - Wikipedia, the free encyclopedia /**/ @import /skins-1. ...

External links

• Mindat
• Webmineral
• Mineral galleries