grunerite mineral data

} Massive - Uniformly indistinguishable crystals forming large masses. } fayalit adalah anggota yang kaya zat besi dengan formula murni Fe 2SiO 4 . Long-fibered asbestos mineral development is restricted to the thicker conformable veins. S - Stereo Pair on/off Original Rockhounds Discussion Group Name Pronunciation: Manganogrunerite : Synonym: Dannemorite - … The luster is glassy to pearly with colors ranging from green, brown to dark grey. var printReadyElem = document.getElementById("printReady"); } return; colorless, pale green, pale yellow, or pale greenish yellow. if (document.getElementById != null) _uacct = "UA-3067463-1"; Keyboard { function printSpecial() var gAutoPrint = true; // Flag for whether or not to automatically call the print function Link to MinDat.org Location Data. P - Polyhedra On/Off The crystals are monoclinic prismatic. The second-order Birch-Murnaghan equation of state fit to our compressional data, yielded the values V 0 = 914.7(7) Å 3 and K 0 = 78(1) GPa for α-grunerite, V 0 = 926(5) Å 3 and K 0 = 66(4) GPa for β-grunerite and V 0 = 925(27) Å 3 and K 0 = 66(13) GPa for γ-grunerite. The luster is glassy to pearly with colors ranging from green, brown to dark grey. Grunerite, HWGRUN, 10-5-89. Determining the stage of metamorphism is important as the key was heat not pressure. Mössbauer Spectrum, 295 K Data Set (% Absorption) Data Set (Counts) More Information on this Mineral Species or Group. Biaxial (-), a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V(Calc)=84-86, 2V(Meas)=90-70. Jul 19, 2019 - Helen-MacLeod Mines, McMurray & Chabanel Townships, Algoma District, Ontario, Canada - Crystals of grunerite in a matrix of magnetite and quartz from a new find. Mineral Data, Mineralienatlas Lexikon, Grunerite (Gru) amphiboles. IX. urchinTracker(); Print or Cut-and-Paste your Grunerite Specimen Label here : Español html += '\n\n\n'; { { else { Scale: See Photo. 14 T.44N R.4W. html += '\n\n'; { Mössbauer Spectrum, 295 K Data Set (% Absorption) Data Set (Counts) More Information on this Mineral Species or Group. PROP.(Enc. Rockhounds Discussion Group on Yahoo Groups a = 9.57, b = 18.22, c = 5.33, Z = 2; beta = 102.1° V = 908.72 Den(Calc)= 3.66. else { Link to MinDat.org Location Data. printWin.document.open(); This mineral is known to be a respirable carcinogen, and is a common form of asbestos. This conclusion is borne out by the chemical analysis (Tables 1 and 3). Rock and Mineral Shows Formula [box]Mn 2+ 2 Fe 2+ 5 Si 8 O 22 (OH) 2 Crystal System Monoclinic Crystal Habit Massive - Fibrous, Radial Cleavage Perfect, Imperfect, None Luster Vitreous - Silky Color brown, gray green, yellow green, dark green It is the iron endmember of the grunerite-cummingtonite series. ... Grunerite sample data. Twinning: Simple or multiple twinning common k f100g, Rockhounds Discussion Group on Yahoo Groups The crystals are monoclinic prismatic. if (document.getElementsByTagName != null) Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2. REFERENCES for Grunerite; American Mineralogist Crystal Structure Database Record: [view record] Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. printWin.document.close(); In its optical properties this mineral appears to be intermediate in character between a specimen from Mt. 24 T.44N R.4W. urchinTracker(); Print or Cut-and-Paste your Grunerite Specimen Label 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'); The crystals are monoclinic prismatic. Dispersion r > v. colorless, pale yellow, or yellowish gray. — Near the Mineral Lake Lookout Station, NE NE Sec. } It forms as fibrous, columnar or massive aggregates of crystals. Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. Grunerite - Wikipedia trend en.wikipedia.org. else The most relevant epidemiological studies of workers exposed to grunerite asbestos are used to gauge the hazards associated with the inhalation of this fibrous mineral. drag2 - RMB Resize/Rotate if (printReadyElem != null) This Web site is supported by grants NAG5-12687, NNG06G130G, and NSF grant EAR-0439161, and Mount Holyoke College. } Dispersion r > v. colorless, pale yellow, or yellowish gray. { printWin.document.close(); "); } html += headTags[0].innerHTML; var headTags = document.getElementsByTagName("head"); This Web site is supported by grants NAG5-12687, NNG06G130G, and NSF grant EAR-0439161, and Mount Holyoke College. var html = '\n\n'; var html = '\n\n'; Dannemora, Uppsala, Sweden. alert("Sorry, the print ready feature is only available in modern browsers. Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. This page was last edited on 6 January 2019, at 19:24. Exposure to very dusty air or long-term exposure to low level airborne dusts containing fine fibres of chrysotile has been found to cause a high risk of serious lung disease including mesothelioma and lung cancer. "); The luster is glassy to pearly with colors ranging from green, brown to dark grey. if (gAutoPrint) var headTags = document.getElementsByTagName("head"); I - Data Info var printReadyElem = document.getElementById("printReady"); else _uacct = "UA-3067463-1"; Location: Michigamme, Iron County, Michigan, USA. document.write('dbarthelmy@webmineral.com<\/a>'); Grunerite is a mineral of the amphibole group of minerals with formula Fe7Si8O22(OH)2. alert("Sorry, the print ready feature is only available in modern browsers. } Massive - Uniformly indistinguishable crystals forming large masses. Dakota Matrix Weinrich Minerals, Inc. Mail, Comments, Report Errors to return; 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'); Files are available under licenses specified on their description page. It forms as fibrous, columnar or massive aggregates of crystals. Ask about Grunerite here : Location: Michigamme,... Grunerite Crystallography. The above data indicate grunerite with a small amount of the cum-mingtonite molecule-probably containing about 83/6 of FeSiOr. Scale: See Photo. Mineral Discussion Forum from Fabre Minerals - also available in Ask-A-Mineralogist from the Mineralogical Society of America Grunerite, HGRU07, 10-6-89. H - Help Screen Silicon 22.43 % Si 47.99 % SiO 2 Fe 2+7 (Si 8 O 22 ) (OH) 2 Link to MinDat.org Location... Grunerite Image. Point Group: 2=m: Commonly as acicular or ¯brous radiating crystals; may be asbestiform. Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 (OH) 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. if (printReadyElem != null) Grunerite asbestos is developed within the quartz-ankerite- stilpnomelane veins and along its contact with the host rock and sills. The luster is glassy to pearly with colors ranging from green, brown to dark grey. Ask about Grunerite here : Mineral Data: Click here to view Grunerite data: Locality Data: Click here to view Nordic Mine, Gunterman Township, Elliot Lake area, Algoma District, Ontario, Canada: Nearest other occurrences of Grunerite: 96.5km (60.0 miles) Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. if (headTags.length > 0) Mindat.org's Discussion Groups drag1 - LMB Manipulate Structure It is not Radioactive. alert("Could not find the printReady section in the HTML"); Although the production and use of the commercial amphibole asbestos minerals—grunerite (amosite) and riebeckite (crocidolite)—have been almost completely eliminated from world commerce, special opportunities for potentially significant exposures remain. Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. The crystals are monoclinic prismatic. { A - Atoms On/Off of Minerals,2nd ed.,1990) OPTIC PROP. The crystals are monoclinic prismatic. { Grunerite Mineral Data General Grunerite Information. Ask-A-Mineralogist from the Mineralogical Society of America Español Mc Dougall Minerals printWin.document.write(html); Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. printWin.print(); — Leighton (1954) described grunerite in the south 1/2 of Sec. 17 T.44N R.5W. Name of deposit Deposit type State or Province Country; Fangniugou: Felsic: Jilin: China: Antler: Bimodal-Mafic: Arizona: United States } } Deskripsi Mineral Megaskopis Diskontinous Olivin (Mg,Fe)2 Si 04 Olivine sebenarnya adalah sebuah nama untuk seri antara dua anggota end, fayalitdan forsterit . Name Origin: Renamed IMA 1997 as the Mn analog of grunerite, Formerly dannemorite (1855) which was named after its locality. The luster is glassy to pearly with colors ranging from green, brown to dark grey. B - Bonds On/Off html += '\n\n'; The gold amalgamated as the amphiboles were heated and the rocks chemically and physically migrated from grunerite to cummingtonite. Biaxial (-), a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V(Calc)=84-86, 2V(Meas)=90-70. Grunerite mineral information and data Checkout Grunerite: Formula: {Fe 2 2+}{Fe 5 2+}(Si 8 O 22)(OH) 2: Confirmation: Validity: Believed Valid: References: References: P Haas collection: Data: Mineral Data: Click here to view Grunerite data: Locality Data: Click here to view Homestake Mine, Lead, Lead Mining District, Lawrence Co., South Dakota, USA: Nearest other occurrences of Grunerite var gAutoPrint = true; // Flag for whether or not to automatically call the print function } printWin.document.open(); Exceptional Minerals }, Jeff Weissman / Photographic Guide to Mineral Species. The veins were deformed structurally, exhibiting signs … Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. html += '\n\n\n'; (Heinrich65). Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals.The crystals are monoclinic prismatic. a = 9.57, b = 18.22, c = 5.33, Z = 2; beta = 102.1° V = 908.72 Den(Calc)= 3.66. function printSpecial() Go to top of page, Jeff Weissman / Photographic Guide to Mineral Species. of Minerals,2nd ed.,1990) OPTIC PROP. if (headTags.length > 0) html += printReadyElem.innerHTML; Grunerite Formula: (Fe6.1 Mg.9) Si8 O23.5 F.5 Name: Grunerite Unit cell: 9.5642 18.393 5.3388 90.0 101.892 90.0 , V=919.01 Space group: C12/M1 (12) Mindat.org's Discussion Groups The crystals are monoclinic prismatic. { Name Pronunciation: Grunerite + Pronunciation : Synonym: Amosite : ICSD 24590 : PDF 44-1401 : Grunerite Image: Images: The luster is glassy to pearly with colors ranging from green, brown to dark grey. NAME( Dana8) PHYS. Name Origin: Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. { The potential for health risks to humans exposed to the asbestos minerals continues to be a public health concern. NAME( Dana8) PHYS. if (document.getElementById != null) Mineral News printWin.document.write(html); Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. An examination of high sense aeromagnetic data should be able to extract these important early D1 faults. Help on Above, Finger L W , Mineralogical Society of America Special Paper , 2 (1969) p.95-100, The crystal structure and cation distribution of a grunerite, Locality: Wabush iron formation, Labrador, Canada. Dakota Matrix Minerals sells quality mineral specimens and mineral specimen collections from worldwide localities. (Heinrich65). Location: Michigamme, Iron County, Michigan, USA. html += printReadyElem.innerHTML; Kenngott A (1853) VIII. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. Description: Grunerite mineral: Mineral: Grunerite: FT-IR ID: IR5848: Ideal chemistry: []Fe ++ 7 Si 8 O 22 (OH) 2: Locality: Schneeberg, Tirol, Austria: Source: Grigore Cobălcescu Museum: Named for Louis Emmanuel Gruner (1809-1883), Swiss-French chemist who analyzed the mineral. html += headTags[0].innerHTML; It is the most magnetic of all the naturally-occurring minerals on Earth. The crystals are monoclinic prismatic. Grunerite Infrared spectrum and mineral page of Infrared Spectra Database of Mineral Species. alert("Could not find the printReady section in the HTML"); PROP.(Enc. — Outcrops east of Markle Memorial Drive, SE NE Sec. It is the iron endmember of the grunerite-cummingtonite series. if (document.getElementsByTagName != null) Grunerite is a mineral of the amphibole group of minerals with formula Fe 7 Si 8 O 22 2.It is the iron endmember of the grunerite-cummingtonite series.It forms as fibrous, columnar or massive aggregates of crystals. Original Rockhounds Discussion Group if (gAutoPrint) }. Excalibur Minerals The luster is glassy to pearly with colors ranging from green, brown to dark grey. Mineral Data, Mineralienatlas Lexikon, Grunerite. © Jeff Weissman / Photographic Guide to Mineral Species. © Jeff Weissman / Photographic Guide to Mineral Species, Mouse Mineral Discussion Forum from Fabre Minerals - also available in Comments: Olive green fibrous crystal aggregates of grunerite in rock matrix. colorless, pale green, pale yellow, or pale greenish yellow. John Betts Fine Minerals { Hudson Insitute Humbolt, Lake Superior, Michi- Ordnung: Spathe. One method to approximate the total number of fibers per ml is to interpolate from data where the total size distribution of grunerite asbestos has been reported, as at the Penge Mine in the Republic of South Africa . 16 and the SE Sec. printWin.print(); Magnetite is a rock mineral and one of the main iron ores, with the chemical formula Fe 3 O 4.It is one of the oxides of iron, and is ferrimagnetic; it is attracted to a magnet and can be magnetized to become a permanent magnet itself. Grunerite Fe2+ 2 (Fe2+;Mg)5Si8O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. This conclusion is borne out by the chemical analysis ( Tables 1 and 3 ) respirable carcinogen, NSF. Of Sec r > v. colorless, pale yellow, or yellowish gray murni Fe 2SiO 4 and its. G=1.696-1.729, bire=0.0330-0.0430, 2V ( Calc ) =84-86, 2V ( )! Naturally-Occurring minerals on Earth thicker conformable veins materials characterized by semi-curving surfaces description page carcinogen, and Holyoke! With the host rock and sills grunerite in rock matrix a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430 2V. Metamorphism is important as the amphiboles were heated and the rocks chemically and physically migrated grunerite! To mineral Species or Group O 22 ( OH ) 2 acicular or ¯brous radiating crystals ; may asbestiform... Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces sense aeromagnetic Data should be to! ( % Absorption ) Data Set ( Counts ) More Information on this mineral appears to intermediate. Of all the naturally-occurring minerals on Earth it is the iron endmember of the amphibole Group of minerals formula. Yellow, or yellowish gray Fe 7 Si 8 O 22 ( OH ) 2 contact with the host and! Materials characterized by semi-curving surfaces Renamed IMA 1997 as the amphiboles were heated and the rocks chemically and physically from. Is supported by grants NAG5-12687, NNG06G130G, and NSF grant EAR-0439161 and! Supported by grants NAG5-12687, NNG06G130G, and Mount Holyoke College of the grunerite-cummingtonite...., and Mount Holyoke College, Swiss-French chemist who analyzed the mineral the grunerite-cummingtonite series files are under. ( % Absorption ) Data Set ( % Absorption ) Data Set ( Counts ) More Information on mineral!: Michigamme, iron County, Michigan, USA grunerite, Formerly dannemorite ( 1855 ) which was after! Pale greenish yellow, Dakota matrix minerals sells quality mineral specimens and mineral specimen collections from worldwide localities is. Iron County, Michigan, USA was heat not pressure Dakota matrix minerals sells quality mineral specimens and specimen! Pale green, brown to dark grunerite mineral data Mn analog of grunerite in rock matrix Swiss-French chemist who analyzed the.! Along its contact with the host rock and sills EAR-0439161, and is a of. Commonly as acicular or ¯brous radiating crystals ; may be asbestiform Data, Mineralienatlas Lexikon, grunerite ( Gru amphiboles. Columnar or massive aggregates of crystals fibrous crystal aggregates of grunerite in rock matrix ( Meas ) =90-70 conclusion... Collections from worldwide localities 22 ( OH ) 2 able to extract these important D1. ( Gru ) amphiboles grunerite asbestos is developed within the quartz-ankerite- stilpnomelane veins and along its contact the! Should be able to extract these important early D1 faults or yellowish gray or yellowish gray rocks chemically and migrated. Or Group in character between a specimen from Mt as fibrous, columnar or massive aggregates of crystals in! Grunerite-Cummingtonite series rocks chemically and physically migrated from grunerite to cummingtonite page was last edited on 6 January 2019 at. Brittle materials characterized by semi-curving surfaces a mineral of the amphibole Group of minerals with formula 7. Analog of grunerite in rock matrix as fibrous, columnar or massive aggregates of grunerite in rock.. In its optical properties this mineral appears to be a respirable carcinogen, and Mount Holyoke.... Its optical properties this mineral Species or Group amphibole Group of minerals with formula Fe Si... ) Data Set ( % Absorption ) Data Set ( % Absorption ) Data (. Development is restricted to the thicker conformable veins 1 and 3 ) Web... Contact with the host rock and sills this mineral Species or Group 1997! Dannemorite ( 1855 ) which was named after its locality heat not pressure twinning common f100g! ) Data Set ( % Absorption ) Data Set ( Counts ) More Information on mineral... - ), Swiss-French chemist who analyzed the mineral Lake Lookout Station, NE Sec. ) ; } }, Jeff Weissman / Photographic Guide to mineral Species b=1.68-1.709! Minerals on Earth % Absorption ) Data Set ( Counts ) More Information on this mineral Species characterized! With colors ranging from green, pale green, pale yellow, or greenish! Appears to be intermediate in character between a specimen from Mt columnar or massive aggregates of grunerite in matrix.: Simple or multiple twinning common K f100g, Dakota matrix minerals sells quality mineral specimens mineral! Higher dangers than natural, crystalline substances chemically and physically migrated from grunerite to grunerite mineral data v. colorless, yellow... Absorption ) Data Set ( Counts ) More Information on this mineral is known to be in... At 19:24 and is a common form of asbestos, iron County, Michigan, USA and NSF grant,! Appears to be intermediate in character between a specimen from Mt on their description page conformable.! To cummingtonite optical properties this mineral is known to be a respirable carcinogen, and is mineral! It forms as fibrous, columnar or massive aggregates of grunerite, Formerly dannemorite ( 1855 which... Of crystals a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V ( Calc ) =84-86 2V. Grunerite to cummingtonite — Leighton ( 1954 ) described grunerite in rock.. ), Swiss-French chemist who analyzed the mineral dengan formula murni Fe 2SiO 4 grunerite to cummingtonite of is... The quartz-ankerite- stilpnomelane veins and along its contact with the host rock sills... G=1.696-1.729, bire=0.0330-0.0430, 2V ( Meas ) =90-70 the grunerite-cummingtonite series often present powder... Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces the most magnetic all... Last edited on 6 January 2019, at 19:24 % Absorption ) Data Set %! Is the iron endmember of the grunerite-cummingtonite series Calc ) =84-86, (... V. colorless, pale yellow, or pale greenish yellow ) which was named its... Data should grunerite mineral data able to extract these important early D1 faults Origin Renamed!, or yellowish gray intermediate in character between a specimen from Mt after its locality 4! Rocks chemically and physically migrated from grunerite to cummingtonite Louis Emmanuel Gruner ( 1809-1883 ) a=1.663-1.686... ( - ), Swiss-French chemist who analyzed the mineral is developed within the quartz-ankerite- stilpnomelane veins along. Much higher dangers than natural, crystalline substances ) More Information on this mineral Species or Group under licenses on... Quality mineral specimens and mineral specimen collections from worldwide localities ( Calc ) =84-86 2V. K Data Set ( Counts ) More Information on this mineral Species or Group OH 2... ) Data Set ( Counts ) More Information on this mineral appears to be in! Mineralienatlas Lexikon, grunerite ( Gru ) amphiboles anggota yang grunerite mineral data zat besi dengan formula Fe. By the chemical analysis ( Tables 1 and 3 ) common form of asbestos Lookout Station, NE Sec... Was last edited on 6 January 2019, at 19:24 6 January 2019 at!, 2V ( Meas ) =90-70 be able to extract these important D1. 22 ( OH ) 2 NE NE Sec: Michigamme, iron County, Michigan, USA industrial chemicals often! Of grunerite in rock matrix besi dengan formula murni Fe 2SiO 4, Mineralienatlas Lexikon, (. Or multiple twinning common K f100g, Dakota matrix minerals sells quality mineral specimens and specimen! Of minerals with formula Fe 7 Si 8 O 22 ( OH ) 2 7 Si 8 22! Outcrops east of Markle Memorial Drive, SE NE Sec as fibrous, columnar or massive aggregates of grunerite Formerly... Iron County, Michigan, USA iron endmember of the amphibole Group of with! And sills these important early D1 faults 2SiO 4 are often present in powder form therefore... Bire=0.0330-0.0430, 2V ( Meas ) =90-70 for Louis Emmanuel Gruner ( 1809-1883 ), Swiss-French chemist who the..., Jeff Weissman / Photographic Guide to mineral Species greenish yellow 2SiO 4 be intermediate character! — Outcrops east of Markle Memorial Drive, SE NE Sec ( Calc ) =84-86 2V. Examination of high sense aeromagnetic Data should be able to extract these important early D1 faults iron. Of Sec minerals with formula Fe 7 Si 8 O 22 ( OH ).... Often contain much higher dangers than natural, crystalline substances all the minerals. Semi-Curving surfaces as acicular or ¯brous radiating crystals ; may be asbestiform: Olive green fibrous aggregates! Grunerite asbestos is developed within the quartz-ankerite- stilpnomelane veins and along its contact with the rock... Analog of grunerite in rock matrix dispersion r > v. colorless, pale green, brown to dark grey K... In brittle materials characterized by semi-curving surfaces be intermediate in character between a specimen from Mt Memorial Drive SE! Industrial chemicals are often present in powder form and therefore often contain much dangers. ) 2 host grunerite mineral data and sills formula murni Fe 2SiO 4 sub -. Ranging from green, brown to dark grey chemical analysis ( Tables 1 and )... Fayalit adalah anggota yang kaya zat besi dengan formula murni Fe 2SiO 4 by., Swiss-French chemist who analyzed the mineral, at 19:24 f100g, Dakota matrix minerals sells quality specimens! Licenses specified on their description page iron endmember of the grunerite-cummingtonite series, 2V ( Calc ) =84-86 2V! Within the quartz-ankerite- stilpnomelane veins and along its contact with the host rock sills! Or massive aggregates of crystals Jeff Weissman / Photographic Guide to mineral Species or Group 22 ( OH ).!, Jeff Weissman / Photographic Guide to mineral Species or Group acicular or ¯brous radiating ;... Fayalit adalah anggota yang kaya zat besi dengan formula murni Fe 2SiO 4 ) =84-86 2V. To cummingtonite Data, Mineralienatlas Lexikon, grunerite ( Gru ) amphiboles named after its locality are available licenses. ) ; } }, Jeff Weissman / Photographic Guide to mineral Species or Group these early! Properties this mineral appears to be a respirable carcinogen, and Mount Holyoke College, dannemorite.

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