• Realgar - Wikipedia

    en.wikipedia.org/wiki/Realgar Realgar, α-As 4 S 4, is an arsenic sulfide mineral, also known as "ruby sulphur" or "ruby of arsenic". It is a soft, sectile mineral occurring in monoclinic crystals, or in granular, compact, or powdery form, often in association with the related mineral, orpiment (As 2 S 3).It is orange-red in color, melts at 320 °C, and burns with a bluish flame releasing fumes of arsenic and sulfur.
  • Realgar and Orpiment - Arsenic Sulfide Minerals

    geology.com/minerals/realgar-orpiment.shtml What is Realgar? Realgar is a monoclinic arsenic sulfide mineral with a brilliant red color and a chemical composition of As 4 S 4.Well-formed realgar crystals can look so much like red gemstones that the mineral was often called "ruby sulfur" and "ruby arsenic.". However, realgar is not used as a gemstone because it is very soft, with a Mohs hardness of just 1-1/2 to 2.
  • Realgar: The arsenic mineral realgar: information and pictures

    www.minerals.net/mineral/realgar.aspx Realgar is an important ore of arsenic. It is used in the manufacturing of fireworks, and was historically used as a red pigment. Realgar is also an important collectors mineral, and the transparent gemmy forms are especially desired.
  • Realgar: Mineral information, data and localities.

    www.mindat.org/min-3375.html From Arabic "rahj al-gahr", powder of the mine. Known as a mineral pigment in Byzantium (essentially Asia Minor and the Balkan Peninsula) at least by the beginning of the thirteenth century and presumably having a name by that time.
  • Realgar has amazing and unique properties. Discover the Truth…

    meanings.crystalsandjewelry.com/realgar Realgar Properties Realgar is an arsenic sulfide mineral that occurs in volcanic hot springs and low-temperature hydrothermal veins. It’s a transparent crystal with a resinous and greasy luster. It’s most commonly dark red, orange, or red in
  • Realgar Mineral Data

    www.webmineral.com/data/Realgar.shtml Physical Properties of Realgar : Cleavage: {010} Good : Color: Aurora red, Orange yellow, Dark red. Density: 3.56 : Diaphaneity: Transparent to translucent
  • Realgar | Definition of Realgar by Merriam-Webster

    www.merriam-webster.com/dictionary/realgar Realgar definition is - an orange-red mineral consisting of arsenic sulfide and having a resinous luster.
  • Realgar - definition of realgar by The Free Dictionary

    www.thefreedictionary.com/realgar Neste sentido, interessa realgar que este tema e > no seio dos educadores e pedagogos da Educacao Nova sem, contudo, descurar a relacao, e a iniciativa, que os alunos > tecem com os seus professores que, por sua vez, terao que estar a altura da dinamica desenvolvida e gerada no seio da turma (Hameline, Jornod e Belkaid, 1995, 36 e 106-115).
  • Realgar | Definition of Realgar at Dictionary.com

    www.dictionary.com/browse/realgar Realgar definition, arsenic disulfide, As2S2, found in nature as an orange-red mineral and also produced artificially: used in pyrotechnics. See more.
  • Realgar | Article about Realgar by The Free Dictionary

    encyclopedia2.thefreedictionary.com/Realgar a mineral, arsenic monosulfide (AsS); contains 70.1 percent arsenic. Realgar has a complex crystal structure. The lattice is constructed of individual As 4 S 4 molecules, with the sulfur ions forming a square, and the arsenic ions a tetrahedron; the centers of the square and tetrahedron coincide. Realgar crystallizes in the monoclinic system, forming bright orange-red prismatic crystals.