STIBNITE Crystal Cluster Metallic Silver Mineral Specimen CHINA

Description: This specimen weighs 25.13 grams. It measures 106 mm x 11 mm x 9 mm. I offer a shipping discount for customers who combine their payments for multiple purchases into one payment! The discount is regular shipping price for the first item and just 50 cents for each additional item! To be sure you get your shipping discount just make sure all the items you want to purchase are in your cart. Auctions you win are added to your cart automatically. For any "buy it now" items or second chance offers, be sure to click the "add to cart" button, NOT the "buy it now" button. Once all of your items are in your cart just pay for them from your cart and the combined shipping discount should be applied automatically. I offer a money back guarantee on every item I sell. If you are not 100% happy with your purchase just send me a message to let me know and I will buy back the item for your full purchase price. Hi there. I am selling this beautiful stibnite crystal mineral specimen! This piece is lustrous and perfect really. It is from Xikuangshan mine, Loudi, Hunan, China. If you have any questions do not hesitate to ask me. Thanks so much for visiting my Ebay store and have a great day! The following is a wikipedia entry about stibnite: Stibnite ArticleTalkReadEditView historyFrom Wikipedia, the free encyclopediaFor the region in the U.S. state of Idaho, see Stibnite Mining District.StibniteStibnite - Herja mine, Maramures, Romania.jpgGeneralCategorySulfide mineralFormula(repeating unit)Sb2S3IMA symbolSbn[1]Strunz classification2.DB.05aCrystal systemOrthorhombicCrystal classDipyramidal (mmm)H-M symbol: (2/m 2/m 2/m)Space groupPbnmUnit cella = 11.229 Å, b = 11.31 Å,c = 3.8389 Å; Z = 4IdentificationColorLead-gray, tarnishing blackish or iridescent; in polished section, whiteCrystal habitMassive, radiating and elongated crystals. Massive and granularTwinningRareCleavagePerfect and easy on {010}; imperfect on {100} and {110}FractureSubconchoidalTenacityHighly flexible but not elastic; slightly sectileMohs scale hardness2LusterSplendent on fresh crystals surfaces, otherwise metallicStreakLead greyDiaphaneityOpaqueSpecific gravity4.63Optical propertiesAnisotropicSolubilitydecomposed with hydrochloric acidReferences[2][3][4]Major varietiesMetastibniteEarthy, reddish depositsStibnite, sometimes called antimonite, is a sulfide mineral with the formula Sb2S3. This soft grey material crystallizes in an orthorhombic space group. It is the most important source for the metalloid antimony.[5] The name is derived from the Greek στίβι stibi through the Latin stibium as the former name for the mineral and the element antimony.[2][3] Structure Structure of stibnite.Stibnite has a structure similar to that of arsenic trisulfide, As2S3. The Sb(III) centers, which are pyramidal and three-coordinate, are linked via bent two-coordinate sulfide ions. However, some studies suggest that the actual coordination polyhedra of antimony are SbS7, with (3+4) coordination at the M1 site and (5+2) at the M2 site. Some of the secondary bonds impart cohesion and are connected with packing.[6] Stibnite is grey when fresh, but can turn superficially black due to oxidation in air. PropertiesThe melting point of Sb2S3 is 823 K (550 °C; 1,022 °F).[7] The band gap is 1.88 eV at room temperature and it is a photoconductor.[8] Uses A microscopic section of StibnitePastes of Sb2S3 powder in fat[9] or in other materials have been used since ca. 3000 BC as eye cosmetics in the Mediterranean and farther afield; in this use, Sb2S3 is called kohl. It was used to darken the brows and lashes, or to draw a line around the perimeter of the eye. Antimony trisulfide finds use in pyrotechnic compositions, namely in the glitter and fountain mixtures. Needle-like crystals, "Chinese Needle", are used in glitter compositions and white pyrotechnic stars. The "Dark Pyro" version is used in flash powders to increase their sensitivity and sharpen their report. It is also a component of modern safety matches. It was formerly used in flash compositions, but its use was abandoned due to toxicity and sensitivity to static electricity.[10] Stibnite was used ever since protodynastic Ancient Egypt as a medication and a cosmetic. The Sunan Abi Dawood reports, “prophet Muhammad said: 'Among the best types of collyrium is antimony (ithmid) for it clears the vision and makes the hair sprout.'”[11] The 17th century alchemist Eirenaeus Philalethes, also known as George Starkey, describes stibnite in his alchemical commentary An Exposition upon Sir George Ripley's Epistle. Starkey used stibnite as a precursor to philosophical mercury, which was itself a hypothetical precursor to the Philosopher's stone.[12] OccurrenceStibnite occurs in hydrothermal deposits and is associated with realgar, orpiment, cinnabar, galena, pyrite, marcasite, arsenopyrite, cervantite, stibiconite, calcite, ankerite, barite and chalcedony.[2] Small deposits of stibnite are common, but large deposits are rare. It occurs in Canada, Mexico, Peru, Japan, China, Germany, Romania, Italy, France, England, Algeria, and Kalimantan, Borneo. In the United States it is found in Arkansas, Idaho, Nevada, California, and Alaska. As of May 2007, the largest specimen on public display (1000 pounds) is at the American Museum of Natural History.[13][14] The largest documented single crystals of stibnite measured ~60×5×5 cm and originated from different locations including Japan, France and Germany.[15]

Price: 32.99 USD

Location: Tucson, Arizona

End Time: 2025-01-10T04:02:14.000Z

Shipping Cost: 5.95 USD