{ of Minerals,2nd ed.,1990) OPTIC PROP. Zoisite is orthorhombic with Z = 4 whereas clinozoisite and epidote are isostructuiral monoclinic and have Z = 2. if (document.getElementById != null) Espa�ol var html = '\n\n'; It is found in magmatic rocks. Scale: Not Given. 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 Keyboard It forms during the metamorphism of an impure limestone and is especially characteristic of contact metamorphic deposits in limestone. The name comes from the Greek epi over plus dotós given (verbid of didóni), i.e., given besides, “increased”. specimen number: 8032767. location: Cerro San Cristobal, Canete, Lima Dept., Peru. html += printReadyElem.innerHTML; S - Stereo Pair on/off Strzegom, Strzegom-Sobótka Massif, Lower Silesian Voivodeship, Poland - The voilet fluorite crystals grown up on two side on a big microcline. The type locality is Bourg d'Oisans, Dauphiné, France. urchinTracker(); Print or Cut-and-Paste your Epidote-(Pb) Specimen Label here : Epidote in a Highly Altered Basalt. printWin.document.write(html); Location: Copper Mt., Prince of Wales, Alaska. drag2 - RMB Resize/Rotate It is an end member of a solid solution series with clinozoisite. { NAME( MinRec) PHYS. Striated - Parallel lines on crystal surface or cleavage face. 4.4cms AXINITE EPIDOTE CRYSTALS cluster peru mineral specimen collectors a306 ROCHARTS. Members of the epidote mineral group have a crystal structure that consists of isolated and paired silica tetrahedrons. One side together with strzegomite, a variety of epidote. Epidote has a chemical composition of Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH). Epidote is an abundant rock-forming mineral, but one of secondary origin. The faces are often deeply striated and crystals are often twinned. Handcockite - Renamed to Epidote-(Pb) - Recommended nomenclature of epidote-group minerals, Eur. B - Bonds On/Off A supergroup of monoclinic sorosilicates with the general formula given above. { 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. { Mineral Discussion Forum from Fabre Minerals - also available in assumed that each mineral is electrically neutral and that the positive charges 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 - … Epidote Mineral Facts: Chemical Formula: Ca 2 (Al-Fe) 3 (OH)(SiO 4) 3 Silicate of aluminum, calcium and iron, with water. 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. Mineral. printWin.document.write(html); if (document.getElementsByTagName != null) RMB - Cycle Display Modes General Epidote Information. { html += headTags[0].innerHTML; tourmaline). tourmaline). alert("Could not find the printReady section in the HTML"); © Lou Perloff / Photo Atlas of Minerals, Comments: Colorless, transparent hexagonal prism of nasonite on reddish brown hancockite (epidote-(Pb)). Mineral Discussion Forum from Fabre Minerals - also available in function printSpecial() return; { else 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. B - Bonds On/Off } alert("Could not find the printReady section in the HTML"); html += printReadyElem.innerHTML; H - Help Screen The photos above show epidote that has filled an amygdule in a highly altered basalt. function printSpecial() Epidote in Hand Sample. The name is derived from the Greek word "epidosis" which means "addition." return; Notice that the element Iron is missing from the formula for Clinozoisite. Ask about Epidote here : Mineral Structure Data. A2M3(Si2O7) (SiO4)O (OH) Name: After the principal member of the group. printWin.print(); Which is a calcium aluminum silicate hydroxide with a chemical formula of Ca2Al3(SiO4)3(OH). 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. It is a lustrous yellow-green crystalline mineral, common in metamorphic rocks. "); The Epidote group is composed of minerals of the general formula Ca 2 Al 3 Si 3 O 12 (OH). if (gAutoPrint) T… if (printReadyElem != null) The color of the epidote is typical: a sort of off-color yellow-green. Epidote Characterized by its peculiar green color and one perfect cleavage, this mineral was discovered in 1801 in France. a mineral, calcium aluminum iron silicate, Ca2(Al, Fe)3Si3O12(OH), occurring in green prismatic crystals. F - Fit to Screen Chemical Formula: Ca2 (Fe+++,Al)3 (SiO4)3 (OH) = Ca2 (Fe,Al)Al2 (SiO4) (Si2O7)O (OH) Composition: Molecular Weight = 519.30 gm. alert("Sorry, the print ready feature is only available in modern browsers. Epidote is a stone that can be pistachio green, gray or black. It is generated through the hydrothermal process in the cracks. drag1 - LMB Manipulate Structure Dispersion r > v perceptible. They occur as prismatic, slender grooved crystals and as fibrous radiating aggregates. var headTags = document.getElementsByTagName("head"); M - Menu if (headTags.length > 0) colorless, pale rose, or greenish yellow. }, Valid Species (Pre-IMA) 1899 - Dana # Changed from 58.2.1a.8. printWin.document.open(); var printReadyElem = document.getElementById("printReady"); html += '\n\n\n'; drag1 - LMB Manipulate Structure © Lou Perloff / Photo Atlas of Minerals, Mouse 2009). } The color is green, grey, brown or nearly black, but usually a characteristic shade of yellowish-green or pistachio-green. Epidote when … H - Help Screen 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). Epidote Group. Keyboard Named for Elwood P. Hancock (1836-1916), of Berlinton, New Jersey, USA, collector of minerals from Franklin. Primarily of interest to researchers and collectors: well-formed crystals are treasured and occasionally cut into gemstones. if (printReadyElem != null) . 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 Hancockite is scientifically recognized as an individual mineral species with a chemical formula of CaPb2Al2Fe (SiO4)3(OH). printWin.document.open(); It can also be found in schists and marbles. 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 Sale Price $23.99 $ … Epidote is a calcium aluminium iron silicate hydroxide that belongs to the Epidote group of minerals. 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). } if (headTags.length > 0) The stone known as Dream Quartz is Epidote in … Drag2 - Resize Rockhounds Discussion Group on Yahoo Groups Epidote. Epidote (Greek - addition) is named after the numerous crystal faces. P - Polyhedra On/Off drag2 - RMB Resize/Rotate It is also a product of hydrothermal alteration of various minerals ( feldspars , micas , pyroxenes , amphiboles , garnets , and others) composing igneous rocks . Brittle - Uneven - Very brittle fracture producing uneven fragments. 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. 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. The color is green, grey, brown or nearly black, … { Prismatic - Crystals Shaped like Slender Prisms (e.g. 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. else var gAutoPrint = true; // Flag for whether or not to automatically call the print function From shop ROCHARTS. PROP.(Enc. S - Stereo It is particular common in metamorphosed basalts and gabbros where it replaces plagioclase, pyroxene and olivine. Dispersion strong, r > v. greenish yellow, greenish brown, or greenish yellow. Comments: Clear crystals of clinohedrite on hancockite (epidote-(Pb)). Location: Franklin, Sussex County, New Jersey, USA. { This and many more mineral specimens are available for sale at Dakota Matrix Minerals. I - Indicies alert("Sorry, the print ready feature is only available in modern browsers. Warning: this large pop-up is very compute intensive and html += '\n\n\n'; Rockhounds Discussion Group on Yahoo Groups I - Data Info - Pink, lead-rich variety of Epidote. Epidote in Thin Section Thin Section GigaPans. 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. } Actual epidote mineral is the most commonly known member of the epidote family. Epidote is a silicate mineral that is typically observed in domestically metamorphosed rocks with composed of Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) 5 out of 5 stars (38) 38 reviews. Location: Franklin, Sussex County, New Jersey, USA. var printReadyElem = document.getElementById("printReady"); 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. if (document.getElementById != null) { Keyboard Epidote forms a solid solution series with the mineral Clinozoisite. In that series, the iron of epidote is gradually replaced by aluminum to the end member clinozoisite composition of Ca2Al3(SiO4)(Si2O7)O(OH). Original Rockhounds Discussion Group Drag1 - Manipulate Crystal A - Atoms On/Off } Epidote is a calcium aluminum iron sorosilicate mineral. Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups I - Data Info Epidote belongs to a group of related minerals. Location: Franklin, Sussex County, New Jersey, USA. P - Polyhedra On/Off Silicon 16.22 % Si 34.71 % SiO 2. } It is following the revision of nomenclature, changes and content published by Armbruster et al. Help on Above. (2006) with the modifications done by IMA (Proposal 09A, Mills et al. Mindat.org's Discussion Groups if (document.getElementsByTagName != null) The stilbite, in this case the most important species on this item, features well developed, highly lustrous and excellent terminated crystals. Massive - Uniformly indistinguishable crystals forming large masses. Ask about Epidote-(Pb) here : var html = '\n\n'; } Comments: Dark green, blocky epidote with transparent quartz. Wikipedia "); All Ferric Iron Recalculation of a mineral formula using a fixed number of oxygens per formula. The "Sum" values are summations of the column of "Atom Units" down to the element listed. The name Epidote comes from the Greek words "epi" which means "over" and "didonai" which means "to give". 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. Prismatic - Crystals Shaped like Slender Prisms (e.g. The characteristic pistachio green … } { html += headTags[0].innerHTML; Epidote in epidosite, plane polars Hancockite was named in honor of Elwood P. Hancock (1834-1916), a presitigous mineral collector specializing in New York and New Jersey minerals. { Yellowish green, Brownish green, Black, Yellow, Gray. This spread sheet converts all iron to Fe+3 for an epidote analysis. 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. Original Rockhounds Discussion Group Scale: Not Given. 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'); Scale: Not Given. html += '\n\n'; J. Epidote definition: a green mineral consisting of hydrated calcium iron aluminium silicate in monoclinic... | Meaning, pronunciation, translations and examples if (gAutoPrint) Help on Above, Ito T , American Mineralogist , 32 (1947) p.309-321, The structure of epidote (HCa2(Al,Fe)Al2Si3O13). Scale: 7 x 5 cm. var gAutoPrint = true; // Flag for whether or not to automatically call the print function Mouse urchinTracker(); Print or Cut-and-Paste your Epidote Specimen Label here : A - Atoms On/Off 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. 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 an abundant rock-forming mineral, but one of secondary origin. (AntBidBlaNic2). Calcium 15.44 % Ca 21.60 % CaO. - Start-Stop Rotation Epidote - Interesting Epidote crystal structure nestled amongst Quartz crystals. } Epidote is named after the numerous crystal faces. Those of metamorphic origin is a mineral found in basic rocks that contain a lot of calcium and aluminum. { printWin.document.close(); _uacct = "UA-3067463-1"; printWin.print(); © Fabre Minerals, Mouse Aluminum 3.90 % Al 7.36 % Al 2 O 3. Espa�ol var headTags = document.getElementsByTagName("head"); Help on Above, Dollase W A , American Mineralogist , 56 (1971) p.447-464, Refinement of the crystal structures of epidote, allanite and hancockite. Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=50. Ask-A-Mineralogist from the Mineralogical Society of America Iron 24.20 % Fe 34.60 % Fe 2 O 3. This mineral is the green inclusion in Unakite Jasper. } Clinozoisite is usually lighter in color than epidote because iron is what produces epidote's greenish to brownish color. else Rare mineral, a silicate of magnesium and aluminium with the chemical formula 8 (Al,Si) 6 O 20 (with iron as a major impurity). else Dbl Clk - Start-Stop Rotation Epidote appears in the colour range from yellowish-green to greenish-black. may not work well with some computers. html += '\n\n'; 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. S - Stereo Pair on/off }, 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. © Lou Perloff / Photo Atlas of Minerals, Comments: Reddish brown prisms of hancockite on matrix. _uacct = "UA-3067463-1"; It occurs in marble and schistose rocks of metamorphic origin. printWin.document.close(); Regular - Flat surfaces (not cleavage) fractured in a regular pattern.