{ PROP.(Enc. alert("Sorry, the print ready feature is only available in modern browsers. { printWin.print(); It is an end member of a solid solution series with clinozoisite. _uacct = "UA-3067463-1"; I - Data Info Rare mineral, a silicate of magnesium and aluminium with the chemical formula 8 (Al,Si) 6 O 20 (with iron as a major impurity). html += headTags[0].innerHTML; if (document.getElementById != null) Epidote, a monoclinic mineral with the idealized formula Ca 2 Al 2 Fe 3+ [Si 2 O 7 ] [SiO 4 ]O (OH), was named by Haüy (1801). There are also several mineral associations of epidote, including quartz, calcite, garnet, albite, hornblende and apatite.Various other green gemstones can cause confusion, including vesuvianite (idocrase), dravite tourmaline, diopside and green garnet. { if (document.getElementById != null) Massive - Uniformly indistinguishable crystals forming large masses. The name is derived from the Greek word "epidosis" which means "addition." html += printReadyElem.innerHTML; J. html += headTags[0].innerHTML; function printSpecial() Calcium 15.44 % Ca 21.60 % CaO. Epidote, any of a group of colourless to green or yellow-green silicate minerals with the general chemical formula A 2 B 3 (SiO 4)(Si 2 O 7)O(OH), in which A is usually calcium (Ca), though manganese (Mn) or cerium (Ce) is sometimes substituted, and B is generally aluminum (Al), with the main substitution being ferric iron (Fe +3). Epidote: Nagashima M, Akasada M (2010) X-ray Rietveld and 57Fe Mossbauer studies of epidote and piemontite on the join Ca2Al2FeSi3O12(OH) - Ca2Al2MnSi3O12(OH) formed by hydrothermal synthesis American Mineralogist 95 1237-1246: 2010: synthetic: 0: 293: 0016952: Epidote The photos above show epidote that has filled an amygdule in a highly altered basalt. RMB - Cycle Display Modes Epidote forms a solid solution series with the mineral Clinozoisite. } I - Indicies © Lou Perloff / Photo Atlas of Minerals, Comments: Colorless, transparent hexagonal prism of nasonite on reddish brown hancockite (epidote-(Pb)). S - Stereo var headTags = document.getElementsByTagName("head"); Aluminum 3.90 % Al 7.36 % Al 2 O 3. Keyboard Espa�ol Epidote in Hand Sample. Epidote in epidosite, plane polars Comments: Dark green, blocky epidote with transparent quartz. printWin.document.open(); if (printReadyElem != null) }, Valid Species (Pre-IMA) 1899 - Dana # Changed from 58.2.1a.8. else Mindat.org's Discussion Groups Mineral Discussion Forum from Fabre Minerals - also available in }, Minerals in Thin Section-University of North Carolina, University of Colorado - Mineral Structure Data, Ca2(Fe+++,Al)3(SiO4)3(OH) = Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH), Valid Species (Pre-IMA) 1801 - Dana # Changed from 58.2.1a.7, a = 8.98, b = 5.64, c = 10.22, Z = 2; beta = 115.4° V = 467.58 Den(Calc)= 3.69. Epidote when … tourmaline). A - Atoms On/Off Rockhounds Discussion Group on Yahoo Groups The type locality is Bourg d'Oisans, Dauphiné, France. It is a lustrous yellow-green crystalline mineral, common in metamorphic rocks. { The name Epidote comes from the Greek words "epi" which means "over" and "didonai" which means "to give". html += '\n\n'; It is also a product of hydrothermal alteration of various minerals ( feldspars , micas , pyroxenes , amphiboles , garnets , and others) composing igneous rocks . Comments: Clear crystals of clinohedrite on hancockite (epidote-(Pb)). Epidote is a calcium aluminium iron silicate hydroxide that belongs to the Epidote group of minerals. var gAutoPrint = true; // Flag for whether or not to automatically call the print function Striated - Parallel lines on crystal surface or cleavage face. html += '\n\n\n'; From shop ROCHARTS. It forms during the metamorphism of an impure limestone and is especially characteristic of contact metamorphic deposits in limestone. Rockhounds Discussion Group on Yahoo Groups Prismatic - Crystals Shaped like Slender Prisms (e.g. Epidote Characterized by its peculiar green color and one perfect cleavage, this mineral was discovered in 1801 in France. 5 out of 5 stars (38) 38 reviews. The faces are often deeply striated and crystals are often twinned. It occurs in marble and schistose rocks of metamorphic origin. _uacct = "UA-3067463-1"; The stilbite, in this case the most important species on this item, features well developed, highly lustrous and excellent terminated crystals. Formula: Ca 2 (Al 2 Fe 3+)(Si 2 O 7)(SiO 4)O(OH) 2 Monoclinic Description: Epidote is a common mineral formed during low grades of metamorphism and hydrothermal activity. Mouse if (gAutoPrint) Dbl Clk - Start-Stop Rotation Silicon 16.22 % Si 34.71 % SiO 2. urchinTracker(); Print or Cut-and-Paste your Epidote Specimen Label here : This and many more mineral specimens are available for sale at Dakota Matrix Minerals. Zoisite is orthorhombic with Z = 4 whereas clinozoisite and epidote are isostructuiral monoclinic and have Z = 2. The name comes from the Greek epi over plus dotós given (verbid of didóni), i.e., given besides, “increased”. Mindat.org's Discussion Groups All Ferric Iron Recalculation of a mineral formula using a fixed number of oxygens per formula. Strzegom, Strzegom-Sobótka Massif, Lower Silesian Voivodeship, Poland - The voilet fluorite crystals grown up on two side on a big microcline. printWin.document.close(); Named for Elwood P. Hancock (1836-1916), of Berlinton, New Jersey, USA, collector of minerals from Franklin. P - Polyhedra On/Off Epidote appears in the colour range from yellowish-green to greenish-black. 2006, 18, 551-567. a = 9.03, b = 5.62, c = 10.29, Z = 2; beta = 115.9° V = 469.75 Den(Calc)= 4.12. A - Atoms On/Off Epidote has a chemical composition of Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH). { Regular - Flat surfaces (not cleavage) fractured in a regular pattern. { } { They occur as prismatic, slender grooved crystals and as fibrous radiating aggregates. Diaboukara, Arrondissement Diakon, Cercle de Bafoulabé, Kayes Region, Mali - Numerous of bow tie shaped creme white and lucent crystals of stilbite accompanied by dark olive green coloured blocky epidote and botryoidal, grey prehnite. Mineral Discussion Forum from Fabre Minerals - also available in html += '\n\n\n'; Original Rockhounds Discussion Group It is found in magmatic rocks. It is generated through the hydrothermal process in the cracks. urchinTracker(); Print or Cut-and-Paste your Epidote-(Pb) Specimen Label here : Epidote Group. (AntBidBlaNic2). Keyboard Actual epidote mineral is the most commonly known member of the epidote family. © Fabre Minerals, Mouse B - Bonds On/Off description: In exceptional large cabinet specimen for the species from Peru with mostly lustrous green sharp crystals to 4.0 cm in size covering all but two sides of this matrix. Relatively large crystals of flawless facet rough are not uncommon, but faceted stones are limited to small sizes and may appear black because of the dark tone of the material. } - Start-Stop Rotation var html = '\n\n'; Yellowish green, Brownish green, Black, Yellow, Gray. General Epidote Information. Ask-A-Mineralogist from the Mineralogical Society of America else printWin.document.open(); Well developed crystals of epidote, Ca2Al2(Fe ;Al)(SiO4)(Si2O7)O(OH), crystallizing in the monoclinicsystem, are of frequent occurrence: they are commonly prismatic in habit, the direction of elongation being perpendicular to the single plane of symmetry. The combination of quartz with this stone, due to the amplification properties of quartz, helps it to have a stronger action to resonate this combined energy outwards. else This spread sheet converts all iron to Fe+3 for an epidote analysis. S - Stereo Pair on/off Epidote - Interesting Epidote crystal structure nestled amongst Quartz crystals. a mineral, calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals. The color is green, grey, brown or nearly black, but usually a characteristic shade of yellowish-green or pistachio-green. I - Data Info Epidote differs from the monoclinic dimorph of zoisite (clinozoisite) in that it contains an admixture of the corresponding iron silicate which is unknown as an independent mineral. Scale: Not Given. var headTags = document.getElementsByTagName("head"); Epidote is a stone that can be pistachio green, gray or black. } Prismatic - Crystals Shaped like Slender Prisms (e.g. Primarily of interest to researchers and collectors: well-formed crystals are treasured and occasionally cut into gemstones. Notice that the element Iron is missing from the formula for Clinozoisite. Scale: Not Given. drag2 - RMB Resize/Rotate Keyboard function printSpecial() may not work well with some computers. Epidote is named after the numerous crystal faces. Location: Franklin, Sussex County, New Jersey, USA. © Lou Perloff / Photo Atlas of Minerals, Comments: Reddish brown prisms of hancockite on matrix. Epidote is a calcium aluminum iron sorosilicate mineral. { var gAutoPrint = true; // Flag for whether or not to automatically call the print function } alert("Could not find the printReady section in the HTML"); Scale: Not Given. Ask about Epidote here : 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'); assumed that each mineral is electrically neutral and that the positive charges specimen number: 8032767. location: Cerro San Cristobal, Canete, Lima Dept., Peru. printWin.document.close(); Epidote Mineral Facts: Chemical Formula: Ca 2 (Al-Fe) 3 (OH)(SiO 4) 3 Silicate of aluminum, calcium and iron, with water. Dispersion r > v perceptible. Many of the characters of the mineral vary with the amount of iron present for instance, the color, the optical constants, and the specific gravity. Sale Price $23.99 $ … Hancockite was named in honor of Elwood P. Hancock (1834-1916), a presitigous mineral collector specializing in New York and New Jersey minerals. It is particular common in metamorphosed basalts and gabbros where it replaces plagioclase, pyroxene and olivine. Help on Above, Ito T , American Mineralogist , 32 (1947) p.309-321, The structure of epidote (HCa2(Al,Fe)Al2Si3O13). This mineral is the green inclusion in Unakite Jasper. Handcockite - Renamed to Epidote-(Pb) - Recommended nomenclature of epidote-group minerals, Eur. NAME( MinRec) PHYS. The characteristic pistachio green … 4.4cms AXINITE EPIDOTE CRYSTALS cluster peru mineral specimen collectors a306 ROCHARTS. Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=50. drag1 - LMB Manipulate Structure Warning: this large pop-up is very compute intensive and return; } General Epidote-(Pb) Information : Chemical Formula: (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH) Composition: Molecular Weight = 583.18 gm Strontium 3.00 % Sr 3.55 % SrO: Calcium 8.25 % Ca 11.54 % CaO: Manganese 2.83 % Mn 2.43 % MnO / 1.35 % Mn 2 O 3: Aluminum 9.25 % Al 17.48 % Al 2 O 3: Iron 8.62 % Fe 12.32 % Fe 2 O 3: Silicon 14.45 % Si 30.91 % SiO 2 Brittle - Uneven - Very brittle fracture producing uneven fragments. Espa�ol Epidote in a Highly Altered Basalt. Epidote is an abundant rock-forming mineral, but one of secondary origin. Help on Above, Dollase W A , American Mineralogist , 56 (1971) p.447-464, Refinement of the crystal structures of epidote, allanite and hancockite. tourmaline). Which is a calcium aluminum silicate hydroxide with a chemical formula of Ca2Al3(SiO4)3(OH). if (gAutoPrint) 2009). S - Stereo Pair on/off Epidote definition: a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic... | Meaning, pronunciation, translations and examples H - Help Screen Scale: 7 x 5 cm. Epidote (Greek - addition) is named after the numerous crystal faces. if (headTags.length > 0) H - Help Screen B - Bonds On/Off Mineral Structure Data. The Epidote group is composed of minerals of the general formula Ca 2 Al 3 Si 3 O 12 (OH). Epidote in Thin Section Thin Section GigaPans. colorless, pale rose, or greenish yellow. printWin.document.write(html); "); { Dispersion strong, r > v. greenish yellow, greenish brown, or greenish yellow. A supergroup of monoclinic sorosilicates with the general formula given above. Biaxial (-), a=1.723-1.751, b=1.73-1.784, g=1.736-1.797, bire=0.0130-0.0460, 2V(Calc)=62-84, 2V(Meas)=64-89. } Location: Franklin, Sussex County, New Jersey, USA. Epidote in unakite Epidote in a different unakite Epidote in Catoctin Formation metabasalt Epidote-family mineral zoisite, with black hornblende and red corundum (ruby) Epidote marking a fault contact between two gneisses. Clinozoisite is usually lighter in color than epidote because iron is what produces epidote's greenish to brownish color. Members of the epidote mineral group have a crystal structure that consists of isolated and paired silica tetrahedrons. M - Menu } { In that series, the iron of epidote is gradually replaced by aluminum to the end member clinozoisite composition of Ca2Al3(SiO4)(Si2O7)O(OH). 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'); Epidote is a silicate mineral that is typically observed in domestically metamorphosed rocks with composed of Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) General Epidote-(Pb) Information : Chemical Formula: (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH) Composition: Molecular Weight = 583.18 gm Strontium 3.00 % Sr 3.55 % SrO: Calcium 8.25 % Ca 11.54 % CaO: Manganese 2.83 % Mn 2.43 % MnO / 1.35 % Mn 2 O 3: Aluminum 9.25 % Al 17.48 % Al 2 O 3: Iron 8.62 % Fe 12.32 % Fe 2 O 3: Silicon 14.45 % Si 30.91 % SiO 2 . T… The stone known as Dream Quartz is Epidote in … Epidote belongs to a group of related minerals. if (headTags.length > 0) Location: Franklin, Sussex County, New Jersey, USA. return; It is an abundant rock-forming mineral, but one of secondary origin. F - Fit to Screen var printReadyElem = document.getElementById("printReady"); Epidote. Mineral. if (printReadyElem != null) drag2 - RMB Resize/Rotate Hancockite is scientifically recognized as an individual mineral species with a chemical formula of CaPb2Al2Fe (SiO4)3(OH). html += printReadyElem.innerHTML; Ask about Epidote-(Pb) here : { © Lou Perloff / Photo Atlas of Minerals, Mouse if (document.getElementsByTagName != null) { Iron 24.20 % Fe 34.60 % Fe 2 O 3. Epidote Formula Ca 2 Fe 3+ Al 2 (Si 2 O 7)(SiO 4)O(OH) Crystal System Monoclinic Crystal Habit Prismatic, Fibrous, Massive Cleavage Perfect, None, None Luster Vitreous (Glassy) Color yellowish green, brownish green, black, yellow, gray Streak grayish white Class Monoclinic - … A2M3(Si2O7) (SiO4)O (OH) Name: After the principal member of the group. printWin.print(); var printReadyElem = document.getElementById("printReady"); alert("Could not find the printReady section in the HTML"); "); - Pink, lead-rich variety of Epidote. It can also be found in schists and marbles. The color is green, grey, brown or nearly black, … (2006) with the modifications done by IMA (Proposal 09A, Mills et al. Help on Above. Location: Copper Mt., Prince of Wales, Alaska. alert("Sorry, the print ready feature is only available in modern browsers. Wikipedia Chemical Formula: Ca2 (Fe+++,Al)3 (SiO4)3 (OH) = Ca2 (Fe,Al)Al2 (SiO4) (Si2O7)O (OH) Composition: Molecular Weight = 519.30 gm. P - Polyhedra On/Off Original Rockhounds Discussion Group drag1 - LMB Manipulate Structure The color of the epidote is typical: a sort of off-color yellow-green. The "Sum" values are summations of the column of "Atom Units" down to the element listed. if (document.getElementsByTagName != null) else printWin.document.write(html); Drag1 - Manipulate Crystal } Those of metamorphic origin is a mineral found in basic rocks that contain a lot of calcium and aluminum. One side together with strzegomite, a variety of epidote. The interference colors, too, are classic: various shades of pastels within individual grains.The opaque material around the amygdule is a mixture of glass, hematite and chlorite. Drag2 - Resize html += '\n\n'; It is following the revision of nomenclature, changes and content published by Armbruster et al. 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