Apatite-(CaF) Beryl Muscovite Apatite Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. M - Menu printWin.document.write(html); { Updates? ", a = 9.38, c = 6.89, Z = 2; V = 525.00 Den(Calc)= 3.22. Apatite is known by gemstone connoisseurs especially for two colors; the Paraiba-like blue-green, and the leek-green color that once earned apatite the name "asparagus stone". Name Origin: Named in 1788 from the Greek apatao - "I am misleading." The group contains three series: the apatite, the pyromorphite, and the svabite (intermediate between the other two). It is found in its blue and purple crystal forms in Ehrenfriedersdorf, Germany. { else These minerals are all calcium phosphates, differing from one another chemically only in that fluorapatite contains fluorine; chlorapatite, chlorine; hydroxylapatite, a hydroxyl (OH) group; and carbonate-apatite, a carbonate (CO3) group. Ask about Apatite here : Corrections? APATITE BACKGROUND INFORMATION. { …essentially rubidium-free, strontium-rich phase like apatite retains its initial. Most of the apatite rock mined throughout the world is used to produce phosphate fertilizer. Apatite is widely distributed in all rock types ( igneous , sedimentary and metamorphic ), but usually as small disseminated grains, or cryptocrystalline fragments. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. } var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); It is described in the statute as a chalcedony pseudomorph after coral, appearing as limestone geodes lined with botryoidal agate or quartz crystals and drusy quartz fingers, indigenous to Florida. } Apatite is a group of phosphate minerals, usually referring to hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. - Start-Stop Rotation Chemical composition - Ca 5 (PO4) 3 (OH, F, Cl) Hardness - 5. if (printReadyElem != null) The name comes from the Greek word apate, which means, "to deceive." Apatite contains many minor and trace elements and can be used as an ore for rare earth elements. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin Co., Maine, USA : Granite pegmatite. if (headTags.length > 0) Apatite forms under a wide variety of conditions and is found in igneous, metamorphic, and sedimentary rocks. (Mason68) OPTIC PROP. Specific gravity - 3.1-3.2. It is green, grayish-green, … Comments: Pink, colliform carbonate-fluorapatite on matrix. Ask-A-Mineralogist from the Mineralogical Society of America In the geological world, apatite is used for fission track dating, a technique that determines the age of a mineral sample by its uranium content. Very large crystals also come from Ontario, at Bear Lake in Tory Hill, and at Cardiff, … Made from a common group of minerals containing a calcium phosphate base, Apatite reminds us that truly knowing oneself is the key to opening up the doors of the universe, a place where anything is possible. There would be little need for evaluating apatite’s response to X-rays. NAME( Duda&Rejl90) PHYS. Omissions? Apatite is a phosphate mineral that is found in many colors and formations. } Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. It is more resistant to acids than fluroapatite though it is not as hard. "Apatite" is an unusual name for a very common family of minerals that appears in small amounts in all kinds of rocks AND in large amounts in bones. { I - Indicies Apatite cement consisting of TTCP and DCPA has become clinically available. printWin.document.close(); Link to MinDat.org Location Data. Some of these deposits contain enough phosphorus that they can be mined and used to produce fertilizers and chemical products. Apatite gemstones are found around the globe, with major sources located in Brazil, Russia, Sri Lanka, Burma and Mexico. Florida Geological Survey_DEP Staff_Agatized Coral with Quartz.jpg In 1979 the Florida Legislature designated agatized coral as the Florida State Stone. else urchinTracker(); Print or Cut-and-Paste your Apatite Specimen Label here : if (document.getElementsByTagName != null) var printReadyElem = document.getElementById("printReady"); Dbl Clk - Start-Stop Rotation IMA Status: Not Approved IMA : Locality: Common world wide. F - Fit to Screen Blue apatite is a prized mineral specimen by rock collectors for its vibrant royal blue color. These ions can freely substitute in the crystal lattice and all three are usually present in every specimen although some specimens have been close to 100% in one or the other. Mineral Discussion Forum from Fabre Minerals - also available in A pink Apatite has recently come from the La Marina Mine, Boyaca, Colombia. Named in 1788 from the Greek apatao - "I am misleading. Large, well-formed crystals can be found in certain contact metamorphic rocks. Scale: Size Not Given. Moroxite: A blue-green variety of Apatite from Arendal, Norway. Apatite is the name given to a group of three related minerals the most common of which is fluorapatite(Ca 5 (PO 4) 3 F), and more rarely clorapatite(Ca 5 (PO 4) 3 Cl) and hydroxylapatite(Ca 5 (PO 4) 3 OH). Apatite is now a group name for a series of related minerals. html += '\n\n'; The colorless variation occurs in Austria and Portugal. The stone is found translucent to transparent in clarity. Massive - Granular - Common texture observed in granite and other igneous rock. { }, University of Colorado - Mineral Structure Data. Chlorapatite and carbonate-apatite are comparatively rare. Pseudoapatite: Name for apatite pseudomorph after pyromorphite. Apatite has a high fluoride content and is a source of fluoride additives used in the United States. Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. An example of this habit is displayed in the photo to the lower right. Enormous deposits mined for industrial use exist … Mindat.org's Discussion Groups It has a wide variety of colour. Location: Nagar area, Gilgit district, Northern Areas, Pakistan. Blue apatite shows broader elements with strong bands at 512, 491 and 464 nm.The apatite minerals respond variously to UV with some yellow speci-mens showing a lilac-pink under both LW and SW and some blue stones giving bright, deep violet-blue to sky blue. Scale: Not Given. There, phosphatic organic debris (such as bones, teeth, scales, and fecal material) had accumulated and was mineralized during diagenesis. _uacct = "UA-3067463-1"; Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Apatite is the most abundant minor mineral in the Gloserheia pegmatite, especially in intermediate zone I, where it is found in crystals up to one meter across. If not for its softness (Mohs hardness 5, compared with the 7 to 9 of most gems), apatite would be a popular gemstone; much of the material found is clear, but it is fragile and difficult to cut and polish. Let us know if you have suggestions to improve this article (requires login). Drag2 - Resize © Lou Perloff / Photo Atlas of Minerals, Apatite   Apatite-(CaF)   Beryl   Muscovite, Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals. beryl). var html = '\n\n'; Warning: this large pop-up is very compute intensive and } Our editors will review what you’ve submitted and determine whether to revise the article. Apatite is actually three different minerals depending on the predominance of either fluorine, chlorine or the hydroxyl group. (Mason68). Apatite, any member of a series of phosphate minerals, the world’s major source of phosphorus, found as variously coloured glassy crystals, masses, or nodules. The sections were investigated with reflected and transmitted light, and contained predominantly calcite, with minor mineral phases identified as quartz, pyrite, apatite, dolomite, and chert. if (gAutoPrint) Uniaxial (-), e=1.63, w=1.633, bire=0.0030. html += printReadyElem.innerHTML; In Canada, large glassy Apatite crystals in orange Calcite have come from the Yates mine, Otter Lake, Quebec. © Lou Perloff / Photo Atlas of Minerals. printWin.document.open(); There is also a very rare deep purple apatite, found in the aptly named Mount Apatite in Maine, USA. The formula of the admixture of the three most common endmembers is written as Ca10(PO4)62, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2. Eastern Mt. howlite). Keyboard var headTags = document.getElementsByTagName("head"); Apatite is a mineral that belongs to the group of phosphates formed by the combination of phosphorus, oxygen and cations. January 5, 2017. tyson. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. It is also used to produce animal feed supplements, phosphoric acid, elemental phosphorous, and phosphate compounds for the chemical industry. Apatite group - Oxford pegmatite field. © Dan Weinrich, Apatite   Robertsite   Carbonate-hydroxylapatite, Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite. PROP. While apatite is a common mineral, gem-quality apatite is quite rare. Español For properties, see phosphate mineral (table). Apatite is now a group name for a series of related minerals. The minerals of the apatite group, especially the phosphates, are mostly concentrated in the bones and teeth. Images: Apatite Apatite- (CaF) Beryl Muscovite. Speaking of possibilities…Here’s the game changer in harnessing the full potential of Apatite. Original Rockhounds Discussion Group Leventouri1*, A. Antonakos2, A. Kyriacou1, R. Venturelli1, E. Liarokapis2, V. Perdikatsis3 1Department of Physics and Center for Biological and Materials Physics, Florida Atlantic University, Boca Raton, FL 33431, USA 2Department of Physics, National Technical University of Athens, 15780 Athens, Greece Phosphate rock, which is the main useful product of phosphate ore, consists of calcium phosphate mineral apatite (Ca 5 (PO 4) 3 (OH, F, Cl)) with gangue constituents, which include silica (SiO 2), fluoride (F), calcite (CaCO 3), dolomite (CaMg (CO 3) 2), clay and iron–aluminum oxide (Fe 2 O 3, Al 2 O 3) (Hodge & Popovici, 1994). Crystal Structure Studies of Human Dental Apatite as a Function of Age Th. Apatite occa… html += '\n\n\n'; Apatite, though found all over the world, is extensively found as mineral deposits in Russia and Kola, Peninsula. 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