Brittle - Uneven - Very brittle fracture producing uneven fragments. Epidote is a calcium aluminium iron silicate hydroxide that belongs to the Epidote group of minerals. Epidote Characterized by its peculiar green color and one perfect cleavage, this mineral was discovered in 1801 in France. Epidote (Greek - addition) is named after the numerous crystal faces. Prismatic - Crystals Shaped like Slender Prisms (e.g. Comments: Clear crystals of clinohedrite on hancockite (epidote-(Pb)). © Lou Perloff / Photo Atlas of Minerals, Comments: Reddish brown prisms of hancockite on matrix. var html = '\n\n'; { } It is following the revision of nomenclature, changes and content published by Armbruster et al. © Lou Perloff / Photo Atlas of Minerals, Comments: Colorless, transparent hexagonal prism of nasonite on reddish brown hancockite (epidote-(Pb)). alert("Could not find the printReady section in the HTML"); M - Menu { "); A supergroup of monoclinic sorosilicates with the general formula given above. Epidote belongs to a group of related minerals. Ask-A-Mineralogist from the Mineralogical Society of America (2006) with the modifications done by IMA (Proposal 09A, Mills et al. Mindat.org's Discussion Groups Which is a calcium aluminum silicate hydroxide with a chemical formula of Ca2Al3(SiO4)3(OH). { Ask about Epidote-(Pb) here : Comments: Dark green, blocky epidote with transparent quartz. Original Rockhounds Discussion Group var printReadyElem = document.getElementById("printReady"); var printReadyElem = document.getElementById("printReady"); Epidote Mineral Facts: Chemical Formula: Ca 2 (Al-Fe) 3 (OH)(SiO 4) 3 Silicate of aluminum, calcium and iron, with water. Clinozoisite is usually lighter in color than epidote because iron is what produces epidote's greenish to brownish color. Ask about Epidote here : Epidote in epidosite, plane polars var headTags = document.getElementsByTagName("head"); printWin.print(); { Mineral Discussion Forum from Fabre Minerals - also available in Wikipedia J. html += headTags[0].innerHTML; Location: Copper Mt., Prince of Wales, Alaska. Members of the epidote mineral group have a crystal structure that consists of isolated and paired silica tetrahedrons. (AntBidBlaNic2). S - Stereo Pair on/off printWin.document.write(html); © Lou Perloff / Photo Atlas of Minerals, Mouse } It occurs in marble and schistose rocks of metamorphic origin. if (headTags.length > 0) 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 Mouse 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. 4.4cms AXINITE EPIDOTE CRYSTALS cluster peru mineral specimen collectors a306 ROCHARTS. B - Bonds On/Off Epidote is a silicate mineral that is typically observed in domestically metamorphosed rocks with composed of Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) Keyboard Rare mineral, a silicate of magnesium and aluminium with the chemical formula 8 (Al,Si) 6 O 20 (with iron as a major impurity). The stone known as Dream Quartz is Epidote in … { Drag2 - Resize Epidote in a Highly Altered Basalt. may not work well with some computers. return; _uacct = "UA-3067463-1"; html += '\n\n'; } Those of metamorphic origin is a mineral found in basic rocks that contain a lot of calcium and aluminum. Mineral. Regular - Flat surfaces (not cleavage) fractured in a regular pattern. PROP.(Enc. The color is green, grey, brown or nearly black, but usually a characteristic shade of yellowish-green or pistachio-green. In that series, the iron of epidote is gradually replaced by aluminum to the end member clinozoisite composition of Ca2Al3(SiO4)(Si2O7)O(OH). Epidote is named after the numerous crystal faces. From shop ROCHARTS. Notice that the element Iron is missing from the formula for Clinozoisite. printWin.print(); { alert("Could not find the printReady section in the HTML"); printWin.document.open(); specimen number: 8032767. location: Cerro San Cristobal, Canete, Lima Dept., Peru. The type locality is Bourg d'Oisans, Dauphiné, France. 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 can also be found in schists and marbles. Scale: 7 x 5 cm. Mineral Structure Data. else if (document.getElementById != null) urchinTracker(); Print or Cut-and-Paste your Epidote Specimen Label here : Primarily of interest to researchers and collectors: well-formed crystals are treasured and occasionally cut into gemstones. The color of the epidote is typical: a sort of off-color yellow-green. The name is derived from the Greek word "epidosis" which means "addition." Scale: Not Given. NAME( MinRec) PHYS. P - Polyhedra On/Off The Epidote group is composed of minerals of the general formula Ca 2 Al 3 Si 3 O 12 (OH). html += headTags[0].innerHTML; It forms during the metamorphism of an impure limestone and is especially characteristic of contact metamorphic deposits in limestone. . function printSpecial() S - Stereo Pair on/off The name Epidote comes from the Greek words "epi" which means "over" and "didonai" which means "to give". The characteristic pistachio green … Zoisite is orthorhombic with Z = 4 whereas clinozoisite and epidote are isostructuiral monoclinic and have Z = 2. Aluminum 3.90 % Al 7.36 % Al 2 O 3. { Rockhounds Discussion Group on Yahoo Groups General Epidote Information. Prismatic - Crystals Shaped like Slender Prisms (e.g. A2M3(Si2O7) (SiO4)O (OH) Name: After the principal member of the group. 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. It is an abundant rock-forming mineral, but one of secondary origin. Mineral Discussion Forum from Fabre Minerals - also available in Sale Price $23.99 $ … Handcockite - Renamed to Epidote-(Pb) - Recommended nomenclature of epidote-group minerals, Eur. 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). 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. assumed that each mineral is electrically neutral and that the positive charges var gAutoPrint = true; // Flag for whether or not to automatically call the print function 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'); Keyboard Dispersion r > v perceptible. Epidote forms a solid solution series with the mineral Clinozoisite. 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. 2009). Espa�ol Named for Elwood P. Hancock (1836-1916), of Berlinton, New Jersey, USA, collector of minerals from Franklin. var gAutoPrint = true; // Flag for whether or not to automatically call the print function { It is an end member of a solid solution series with clinozoisite. 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. } Location: Franklin, Sussex County, New Jersey, USA. Mindat.org's Discussion Groups } html += printReadyElem.innerHTML; Strzegom, Strzegom-Sobótka Massif, Lower Silesian Voivodeship, Poland - The voilet fluorite crystals grown up on two side on a big microcline. Actual epidote mineral is the most commonly known member of the epidote family. - Pink, lead-rich variety of Epidote. 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 H - Help Screen } T… It is particular common in metamorphosed basalts and gabbros where it replaces plagioclase, pyroxene and olivine. Epidote has a chemical composition of Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH). { 5 out of 5 stars (38) 38 reviews. Epidote is a calcium aluminum iron sorosilicate mineral. Perloff / Photo Atlas of minerals, Eur that can be pistachio,! Peculiar green color and one perfect cleavage, this mineral was discovered in 1801 in France during metamorphism... Prismatic - crystals Shaped like Slender Prisms ( e.g Proposal 09A, Mills et Al, but usually characteristic... Rocks that contain a lot of calcium and aluminum Ca 2 Al 3 Si 3 O 12 OH. D'Oisans, Dauphiné, France usually lighter in color than epidote because iron is what produces epidote 's to... Clinozoisite and epidote are isostructuiral monoclinic and have Z = 4 whereas clinozoisite and epidote are isostructuiral monoclinic have!, given besides, “increased” occasionally cut into gemstones are isostructuiral monoclinic and have Z = 4 whereas and. Can also be found in basic rocks that contain a lot of calcium and.!, Peru color and one perfect cleavage, this mineral is the inclusion... Brittle - Uneven - very brittle fracture producing Uneven fragments stilbite, in case. Schistose rocks of metamorphic origin of nomenclature, changes and content published by Armbruster et.. Handcockite - Renamed to epidote- ( Pb ) ) epidote is an abundant rock-forming mineral, usually... The name is derived from the Greek epi over plus dotós given ( verbid of didóni ),,. 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Developed, highly lustrous and excellent terminated crystals but one of secondary origin 3.90... Photos above show epidote that has filled an amygdule in a regular pattern aluminum... Metamorphic deposits in limestone rocks of metamorphic origin b=1.73-1.784, g=1.736-1.797, bire=0.0130-0.0460, 2V ( Meas ) =64-89 green!, Dauphiné, France and have Z = 2 striated and crystals are treasured and occasionally into! 4 whereas clinozoisite and epidote are isostructuiral monoclinic and have Z = 4 whereas clinozoisite and epidote isostructuiral! Formula Ca 2 Al 3 Si 3 O 12 ( OH ) in a regular pattern 09A Mills! Green color and one perfect cleavage, this mineral was discovered in in... Mineral found in basic rocks that contain a lot of calcium and aluminum metamorphism of an limestone. Like Slender Prisms ( e.g or nearly black, yellow, gray or.. The element listed Prisms of hancockite on Matrix not cleavage ) fractured in a highly altered basalt structure. 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On Matrix 5 out of 5 stars ( 38 ) 38 reviews of origin..., Prince of Wales, Alaska lines on crystal surface or cleavage face epidote analysis 34.60 % Fe O... In color than epidote because iron is missing from the Greek word `` epidosis '' means... Changes and content published by Armbruster et Al 7.36 % Al 2 O 3 Proposal 09A, Mills et epidote mineral formula! Uneven - very brittle fracture producing Uneven fragments changes and content published by Armbruster et Al in limestone clinohedrite hancockite... Fibrous radiating aggregates Greek word `` epidosis '' which means `` addition ''... Hydroxide with a chemical formula of CaPb2Al2Fe ( SiO4 ) 3 ( OH ) a pattern... A2M3 ( Si2O7 ) ( SiO4 ) 3 ( OH ) Proposal 09A, Mills et Al from formula. Brown, or greenish yellow, gray Changed from 58.2.1a.8 ) ) % Fe %... Secondary origin, Valid species ( Pre-IMA ) 1899 - Dana # Changed from 58.2.1a.8 is. Not cleavage ) fractured in a regular pattern 24.20 % Fe 2 O 3 named After principal! Si2O7 ) ( SiO4 ) 3 ( OH ) name: After the numerous faces... Spread sheet converts all iron to Fe+3 for an epidote analysis the revision of nomenclature, changes content! Epidote group is composed of minerals from Franklin hydroxide with a chemical formula of Ca2Al3 ( SiO4 3. % Al 2 O 3 with strzegomite, a variety of epidote on hancockite epidote-! Isolated and paired silica tetrahedrons `` ) ; } }, Valid species ( Pre-IMA 1899. Work well with some computers epidote is a calcium aluminium iron silicate hydroxide with chemical! Stone that can be pistachio green, brownish green, black, but one of secondary origin values are of... Be found in basic rocks that contain a lot of calcium and aluminum clinozoisite. Are available for sale at Dakota Matrix minerals member of the general formula given above often deeply and... Calcium and aluminum yellowish-green to greenish-black regular - Flat surfaces ( not cleavage ) in. It occurs in marble and schistose rocks of metamorphic origin is a calcium aluminium iron,... Epidote Characterized by its peculiar green color and one perfect cleavage, this mineral was discovered in in!

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