Proustite is a sulfosalt mineral consisting of silver sulfarsenide, Ag₃AsS₃, known also as light red silver or ruby silver ore, and an important source of the metal. It is closely allied to the corresponding sulfantimonide, pyrargyrite, from which it was distinguished by the chemical analyses of J. L. Proust in 1804, after whom the mineral received its name. 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. ... This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... General Name, Symbol, Number silver, Ag, 47 Chemical series transition metals Group, Period, Block 11, 5, d Appearance lustrous white metal Atomic mass 107. ... General Name, Symbol, Number arsenic, As, 33 Chemical series metalloids Group, Period, Block 15, 4, p Appearance metallic gray Atomic mass 74. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Atomic mass 32. ... Pyrargyrite is a sulfosalt mineral consisting of silver sulfantimonite, Ag3SbS3. ... 1804 was a leap year starting on Sunday (see link for calendar). ...

Many of the characters being so similar to those of pyrargyrite they are mentioned under that species. The prismatic crystals are often terminated by the scalenohedron and the obtuse rhombohedron, thus resembling calcite (dog-tooth-spar) in habit. The color is scarlet-vermilion and the lustre adamantine; crystals are transparent and very brilliant, but on exposure to light they soon become dull black and opaque. The streak is scarlet, the hardness 2.5, and the specific gravity 5.57. Calcite from Brushy Creek Mine, Missouri, USA. The mineral calcite is a calcium carbonate corresponding to the formula CaCO3 and is one of the most widely distributed minerals on the Earths surface. ... Alternate meaning: Scarlet (color) Scarlet was a type of woollen cloth common in mediaeval England. ... Categories: Colors | Pigments | Stub ... Adamant is used to refer to any especially hard substance, whether composed of diamond, some other gemstone, or some type of metal. ... Quartz crystal A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... See: transparency (optics) alpha compositing GIF#Transparency transparency (overhead projector) market transparency transparency (telecommunication) transparency (computing) For X11 pseudo-transparency, see pseudo-transparency. ... A substance or object that is opaque is neither transparent nor translucent. ... Relative density (also known as specific gravity) is a measure of the density of a material. ...

The mode of occurrence is the same as that of pyrargyrite, and the two minerals are sometimes found together. Magnificent groups of large crystals have been found at Chafiarcillo in Chile; other localities which have yielded fine specimens are Freiberg and Marienberg in Saxony, Joachimsthal in Bohemia and Markirch in Alsace. Pyrargyrite is a sulfosalt mineral consisting of silver sulfantimonite, Ag3SbS3. ... Freiberg, Obermarkt square Freiberg is a city in Saxony, Germany, capital of the district Freiberg. ... Hardenberg is a municipality and a city in the eastern Netherlands, in the province of Overijssel. ... With an area of 18,413 km² and a population of 4. ... Jáchymov (originally Thal, later Sankt Joachimsthal in German) is a spa town in the Karlovy Vary Region of the Czech Republic, located in St. ... Bohemia For the place in the USA, see Bohemia, New York. ... ‹The template below has been proposed for deletion. ...

See also

• List of minerals

This article incorporates text from the 1911 Encyclopædia Britannica, which is in the public domain. Gem animals. ... Supporters contend that the Eleventh Edition of the Encyclopædia Britannica (1911) represents, in many ways, the sum of knowledge at the beginning of the 20th century. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ...