RED TOPAZ Crystal Cluster Mineral Specimen SAN LUIS POTOSI MEXICO

RED TOPAZ Crystal Cluster Mineral Specimen SAN LUIS POTOSI MEXICO
RED TOPAZ Crystal Cluster Mineral Specimen SAN LUIS POTOSI MEXICO
RED TOPAZ Crystal Cluster Mineral Specimen SAN LUIS POTOSI MEXICO
RED TOPAZ Crystal Cluster Mineral Specimen SAN LUIS POTOSI MEXICO


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Seller Store callistodesigns
(42696) 99.6%,

Location: Tucson, Arizona
Ships to: US,
Item: 365027742767

Restocking Fee:No
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money Back
Type:Topaz
Size:20 mm x 12 mm x 11 mm
Country/Region of Manufacture:Mexico
Weight:1.85 grams

This specimen weighs 1.85 grams. It measures 20 mm x 12 mm x 11 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 cute little Red Topaz crystal cluster mineral specimen. It is from Tepetate, San Luis Potosi, Mexico. If you have any questions, do not hesitate to ask me. Have fun bidding, thanks so much for visiting my auction and have a great day! TopazFrom Wikipedia, the free encyclopediaThis article is about the mineral or gemstone. For other uses, see Topaz (disambiguation).Wiki letter w.svgThis article’s lead section does not adequately summarize key points of its contents. Please consider expanding the lead to provide an accessible overview of all important aspects of the article. Please discuss this issue on the article’s talk page. (August 2016)TopazTopaze, quartz fumé 1.jpgTopaz crystal on matrixGeneralCategory Nesosilicate mineralsFormula(repeating unit) Al2SiO4(F,OH)2Strunz classification 9.AF.35Crystal system OrthorhombicCrystal class Dipyramidal (mmm)H-M symbol: (2/m 2/m 2/m)Space group PbnmUnit cell a = 4.65 Å, b = 8.8 Å,c = 8.4 Å; Z = 4IdentificationColor Colorless (if no impurities), blue, brown, orange, gray, yellow, green, pink and reddish pinkCrystal habit Prismatic crystals with faces striated parallel to long dimension; also columnar, compact, massiveCleavage [001] PerfectFracture Subconchoidal to unevenMohs scale hardness 8 (defining mineral)Luster VitreousStreak WhiteDiaphaneity TransparentSpecific gravity 3.49–3.57Optical properties Biaxial (+)Refractive index nα = 1.606–1.629nβ = 1.609–1.631nγ = 1.616–1.638Birefringence δ = 0.010Pleochroism Weak in thick sections X = yellow; Y = yellow, violet, reddish; Z = violet, bluish, yellow, pinkUltraviolet fluorescence Short UV=golden yellow; Long UV=creamReferences [1][2][3][4]Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F, OH)2. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces. It is one of the hardest naturally occurring minerals (Mohs hardness of 8) and is the hardest of any silicate (i.e., silicon-based) mineral. This hardness combined with its usual transparency and variety of colors means that it has acquired wide use in jewellery as a cut gemstone as well as for intaglios and other gemstone carvings.[5] Contents [hide] 1 Characteristics2 Localities and occurrence3 Etymology4 Historical usage4.1 Superstition5 References6 External linksCharacteristics[edit] Facet cut topaz gemstones in various colors Yellow topaz in stepped kite-shaped cutTopaz in its natural state is a golden brown to yellow, a characteristic which means it is sometimes confused with the less valuable gemstone citrine.[5] A variety of impurities and treatments may make topaz wine red, pale gray, reddish-orange, pale green, or pink (rare), and opaque to translucent/transparent. The pink and red varieties come from chromium replacing aluminum in its crystalline structure. Orange topaz, also known as precious topaz, is the traditional November birthstone, the symbol of friendship, and the state gemstone of the US state of Utah.[6] Imperial topaz is yellow, pink (rare, if natural) or pink-orange. Brazilian Imperial Topaz can often have a bright yellow to deep golden brown hue, sometimes even violet. Many brown or pale topazes are treated to make them bright yellow, gold, pink or violet colored. Some imperial topaz stones can fade on exposure to sunlight for an extended period of time.[7][8] Blue topaz is the state gemstone of the US state of Texas.[9] Naturally occurring blue topaz is quite rare. Typically, colorless, gray or pale yellow and blue material is heat treated and irradiated to produce a more desired darker blue.[8] Mystic topaz is colorless topaz which has been artificially coated via a vapor deposition process giving it a rainbow effect on its surface.[10] Although very hard, topaz must be treated with greater care than some other minerals of similar hardness (such as corundum) because of a weakness of atomic bonding of the stone’s molecules along one or another axial plane (whereas diamonds, for example, are composed of carbon atoms bonded to each other with equal strength along all of its planes). This gives topaz a tendency to fracture along such a plane if struck with sufficient force.[11] Topaz has a relatively low index of refraction for a gemstone, and so stones with large facets or tables do not sparkle as readily as stones cut from minerals with higher refraction indices, though quality colorless topaz sparkles and shows more “life” than similarly cut quartz. When given a typical “brilliant” cut, topaz may either show a sparkling table facet surrounded by dead-looking crown facets or a ring of sparkling crown facets with a dull well-like table.[12] Localities and occurrence[edit]Topaz is commonly associated with silicic igneous rocks of the granite and rhyolite type. It typically crystallizes in granitic pegmatites or in vapor cavities in rhyolite lava flows including those at Topaz Mountain in western Utah and Chivinar in South America. It can be found with fluorite and cassiterite in various areas including the Ural and Ilmen mountains of Russia, in Afghanistan, Sri Lanka, Czech Republic, Germany, Norway, Pakistan, Italy, Sweden, Japan, Brazil, Mexico; Flinders Island, Australia; Nigeria and the United States. Brazil is one of the largest producers of topaz,[13] some clear topaz crystals from Brazilian pegmatites can reach boulder size and weigh hundreds of pounds. Crystals of this size may be seen in museum collections. The Topaz of Aurangzeb, observed by Jean Baptiste Tavernier weighed 157.75 carats.[14] The American Golden Topaz, a more recent gem, weighed a massive 22,892.5 carats. Large, vivid blue topaz specimens from the St. Anns mine in Zimbabwe were found in the late 1980s.[15] Colorless and light-blue varieties of topaz are found in Precambrian granite in Mason County, Texas[16] within the Llano Uplift. There is no commercial mining of topaz in that area.[17] Topaz Mountain, Utah Sherry-colored topaz from Maynard’s Claim (Pismire Knolls), Thomas Range, Juab County, Utah, USA Blue Topaz from Erongo Mountain, Usakos and Omaruru Districts, Erongo Region, Namibia Red topaz from Tepetate, Municipio de Villa de Arriaga, San Luis Potosí, MexicoEtymology[edit]The name “topaz” is usually derived (via Old French: Topace and Latin: Topazus) from the Greek Τοπάζιος (Τοpáziοs) or Τοπάζιον (Τοpáziοn),[18] from Τοπαζος, the ancient name of St. John’s Island in the Red Sea which was difficult to find and from which a yellow stone (now believed to be chrysolite: yellowish olivine) was mined in ancient times; topaz itself (rather than topazios) was not really known before the classical era. Pliny said that Topazos is a legendary island in the Red Sea and the mineral “topaz” was first mined there. Alternatively, the word topaz may be related to the Sanskrit word तपस् “tapas”, meaning “heat” or “fire”.[18] Historical usage[edit]Nicols, the author of one of the first systematic treatises on minerals and gemstones, dedicated two chapters to the topic in 1652.[19] In the Middle Ages, the name topaz was used to refer to any yellow gemstone, but in modern times it denotes only the silicate described above. Many modern English translations of the Bible, including the King James Version mention topaz. However, because these translations as topaz all derive from the Septuagint translation topazi[os], which as mentioned above referred to a yellow stone that was not topaz, but probably chrysolite (chrysoberyl or peridot), it should be borne in mind that topaz is likely not meant here.[20] The masoretic text (the Hebrew on which most modern Protestant Bible translations of the Old Testament are based) has pitdah as the gem the stone is made from; some scholars think it is related to an Assyrian word meaning “flashed”.[citation needed] More likely, “pitdah” is derived from Sanskrit words (पीत pit = yellow, दह् dah = burn), meaning “yellow burn” or, metaphorically, “fiery”[citation needed]. Superstition[edit]An English superstition held that topaz cured lunacy.[21]

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