 | | Journal (article/letter/editorial) | | Universit)t di Bologna, Italy, C.N.R. Centro per la Cristallografia strutturale, Pavia, Italy, Naturhistorisches...Naturhistorisches Museum Wien, Austria Violan Revisited: Mn-Bearing Omphacite and Diopside A. Mottana, G. Rossi, A...clinopyroxenes ("violan") from the manganese deposit of Praborna, near St. Marcel (Aosta Valley, Italy) occur in...the low amounts of manganese being present in "violan". Crystal structure determinations and microprobe...microprobe analyses nevertheless dearly showed that "violan" is not a mineral species. The name should therefore |  | | Journal (article/letter/editorial) | | high-pressure ophiolite metasediments of Praborna ore deposit (Aosta Valley, Western Alps) SIMONE TUMIATI1,*...Studi di Milano, via Botticelli 23, 20133 Milano, Italy *Corresponding author, e-mail: simone.tumiati@unimi...degli Studi di Padova, via Giotto 1, 35137 Padova, Italy 3 Equipe Géobiosphère actuelle et primitive; Institut...deposit of Praborna crops out in the Zermatt-Saas unit of the Western Alps, in the St. Marcel valley. It represents...to the bulk-rock chemistry. Compared to shales, Praborna is enriched in Mn (up to 38.7 wt% Mn2O3) and in |  | Diella, Valeria, Bocchio, Rosangela, Caucia, Franca, Marinoni, Nicoletta, Langone, Antonio, Possenti, Elena (2021) New Insights for Gem-Quality Mn-Bearing Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic Characterization. Minerals, 11 (2) 171 doi:10.3390/min11020171 | Journal (article/letter/editorial) | | Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic...Diopside-Omphacite, Violane Variety, from Saint Marcel (Val D’Aosta, Italy): Its Trace Elements and Spectroscopic...Milan, Italy Department of Earth Sciences “Ardito Desio”, University of Milan, 20133 Milan, Italy; rosangela...Environmental Sciences, University of Pavia, 27100 Pavia, Italy; caucia@crystal.unipv.it National Research Council...Resources (IGG), Section of Pavia, 27100 Pavia, Italy; langone@igg.cnr.it National Research Council, Institute |  | | Journal (article/letter/editorial) | | manganese concentrations at St. Marcel-Praborna, Aosta Valley, Italy: petrography and crystal-chemistry...manganese concentrations at St. Marcel-Praborna in the Aosta Valley, Italy. These titanites arc chemically...titanite, crystal-chemistry, petrography, St. Marcel-Praborna, Italy. Introduction THE manganese concentrations...rhodochrosite; rhodonite; rom6ite; spessartine; futile; 'violan' (diopside-aegirine-jadeite); (e.g. de Lom, 1843;...MnO) collected by de Lom (1843) from the St. Marcel-Praborna locality. Fermor (1908) also mentioned 'greenovite' |  | Tumiati, Simone, Godard, Gaston, Martin, Silvana, Malaspina, Nadia, Poli, Stefano (2015) Ultra-oxidized rocks in subduction mélanges? Decoupling between oxygen fugacity and oxygen availability in a Mn-rich metasomatic environment. Lithos, 226. 116-130 doi:10.1016/j.lithos.2014.12.008 | Journal (article/letter/editorial) | | Milano, via b NU Mangiagalli 34, I-20133 Milano, Italy; simone.tumiati@unimi.it Institut de Physique du...degli Studi di Padova, via Giotto 1, 35137 Padova, Italy d Dipartimento di Scienze dell’Ambiente e del...Scienza 4, 20126 Milano, Italy CE ABSTRACT The manganese ore of Praborna (Italian Western Alps) is...on this dataset and the observed assemblages at Praborna, thermodynamic calculations show that these mélange...with care. From the study of mélange rocks at Praborna, the distribution of oxygen at subduction zones |  | | Journal (article/letter/editorial) | | at the Praborna mine near Saint-Marcel, Val d’Aoste, Italy, and in the upper Maurienne Valley, France...calcite, bustamite, magnetite. 10. Eclogite facies, Praborna, W. Alps (Martin and Kienast, 1987); with hematite...Maurienne Valley, France (Chopin, 1978), on the western tip of the Gran Paradiso massif. The Saint-Marcel...Saint-Marcel locality is the famous Praborna mine, in Val d’Aosta, Italy, on the north-eastern flank of the Gran...latter magnificently developed near Praborna, at the Servette mine (Martin and Tartarotti, 1989)] points |  | Cenki-Tok, Bénédicte, Ragu, Alain, Armbruster, Thomas, Chopin, Christian, Medenbach, Olaf (2006) New Mn- and rare-earth-rich epidote-group minerals in metacherts: manganiandrosite-(Ce) and vanadoandrosite-(Ce) European Journal of Mineralogy, 18 (5) 569-582 doi:10.1127/0935-1221/2006/0018-0569 | Journal (article/letter/editorial) | | site; it occurs at the Praborna manganese mine, Saint-Marcel, Aosta valley, Italy, in a Mesozoic eclogite-facies...The locality studied, the Praborna mine near Saint-Marcel, Val d’Aosta, Italy, belongs to the eclogite-facies...Paradiso massif at the upper end of the Maurienne Valley, France (Chopin, 1978), and on the north-eastern...latter magnificently developed near Praborna, at the Servette mine (Martin & Tartarotti, 1989)] points...compositional banding of the protolith. The Praborna mine near Saint-Marcel is a classical locality from which |  | | Catalog/List | | lx2 £2 lxl£3 2x2£12 lx2£5 lxl £1 ----· Hawkswood Mine, Cornwall ANDALUSITE Cabracao, Minl10, Portugal...Andalucia Spain. Type Location New East Whcal Russell mine, Devon ,England 140 grey bleby small botryoidal..._lx2_ _80 _ _____ _,o 1129 ALMANDINE Braslad iron Mine near Arendal ,Norway Unknown location I 1 63 □a...lxl£2 2x3£6 3x4£8 feldspar ALSTONITE Fallowfield Mine, Northumberland ANDRADITE Grua. Oppland Norway 5...2x3£15 Gamet ½" £3 ALTHAUSITE ANDRADITE Benallt Mine,Lleyn ,Wales Modum, Buskerud,Norway 975 44 Brown-purple |  | | Catalog/List | | massive with minor Celsian and Bementite from Benallt Mine, Lleyn, Wales, (Recently tested by XRD) lxl £4 lx2...£15 £6 88 ADAMITE Ojuela Mine, Mapimi, Mexico 1036 ALSTONITE Fallowfield Mine, Northumberland Colourless...x2 £ 1.50 2x2 £3 Al SO/4 767 ■ AJOITE Christmas Mine, Gila County, Arizona USA 14 ALUMINITE Railway cutting...~-------·-·-- ·· -·· 1077 ■■ ALLOPHANE Hawkswood Mine, Cornwall 933 ANATASE Hingston Quarry,Cornwall Black...Kola Russia 501 ALLOPHANE New East Wheal Russell mine, Devon ,England grey bleby small botryoidal with |  | | Catalog/List | | ___ 2x2£3 ___ - -----~ - ~014_ _ 88 ADAMITE Ojuela Mine, Mapimi, Mexico 69 ALUMOHYDROCALCITE South Bay,...- - --··---- - - - - - · . 767 AJOITE Christmas Mine, Gila County, Arizona USA 17 ANAL CITE Talisker...North Sweden 501 ALLOPHANE New East Whcal Russell mine, Devon ,England variety VIRIDINE (Mangan rich variety)...217 ANDORITE San Jose Mine, Oruro, Bolivia 1129 ■ ALMANDINE Brnstad iron Mine near Arendnl ,Norway Pure...Bcnallt Minc,Llcyn. Wales 1036 ALSTONITE Fnllowlielcl Mine, Northumberland White masses in malrix wilh micro |  | | Journal (article/letter/editorial) | | (alurgite), M n 3 + - Mn z +-bearing Na-pyroxene (violan), carbonate, quartz, hollandite, and hematite....§ piemontites from braunite quartzites at Praborna, Italy, contain up to about 33 mole % Mn 3§ in early...piemontite and thulite has been done. At the idle Mn-mine of Vitali, Andros island, Greece, piemontites of...pressure metamorphic Mn-rich rocks at Praborna, Val d'Aosta, Italy; Griffin and Mottana 1982; Martin-Vernizzi...the high Plow T metamorphic rocks at Praborna, Val d'Aosta, Italy ( M o t t a n a and Griffin 1986). This |  | | Journal (issue) | | ruby 252 Gem News International Large diamond mine to be developed in Saskatchewan, Canada • Spurious...of phenomenal quartz • A new gemstone from Italy: “Violan quartz” • New sources of marble-hosted rubies...and Salvador Assael, a New York importer born in Italy. Wan purchased and enlarged Tahiti Perles, an operation...luxury retailers in the United States, France, Italy, and Japan. As part of the branding process, Perles...The Pearl Book. www.cibjo.us/pearl.pdf, Milan, Italy. TRANSFORMATION OF THE CULTURED PEARL INDUSTRY |  | | Catalog/List | | South Larvik near CITE 13ratthagcn, ANAL 1098 Ojucla Mine, Mapimi, Mexico ADAMITE 88 Unusual rich yellow vitreous...cleavage Ti0/2 Mn S 1.5cm£4 5mm£2 ANATASE Virtuous Lady mine,Devon 26 ALBITE Kragcro Norway 6 single dark blue...mass Cc Ca Y Al Fe SiO 2x2 £12 lx2 £6 Dark Star Mine,Ravalli County, Montana U,S_A ANCYLITE Cc Rich pinkish...ANDALUSITE Ultcvis,Norlh Sweden ALLANITE Ce Dastnas Mine Sweden J 009 variety VTR.IDCNE (Mangan rich variety)...Brittany, France ALLOPllANE New East Whcal Russell mine, Devon ,England 52 501 Rich pinkish mass in dark |  | | Journal (issue) | | Articles Large barite crystals from the Elandsrand gold mine, South A fr ic a ................................. Lyckberg Prehnite from La Combe de la Selle, Saint Christophe-en-Oisans, Isere, France...............Paterson (NJ), Brumado district Museum, Himalaya mine $10 (Brazil), Bosch Collection $10 v.9/#5 Turkish...(PA-MD), Mcguinnessite v Pereta Mine (Italy), Cetine Mine (Italy) v Mineral Fraud, LeadhillsWanlockhead...$10 v .15/#5 Jacupiranga mine (Brazil), Jensen quarry (CA), Cunha Baixa mine, Paulkerrite $10 .16/#4 |  | | Journal (issue) | | Aquamarine with Spodumene Inclusions from the Oceanview Mine, California, USA | Demantoid/ Andradite Slices from...of Different Varieties of Amber from the Hukawng Valley, Myanmar 144 By Xinran Jiang, Zhiqing Zhang,...Federico Pezzotta Natural History Museum of Milan, Italy Jeffrey E. Post Smithsonian Institution, Washington...CIBJO, The World Jewellery Confederation (Milan, Italy) hosts gem and jewellery industry webinars at www...‘Home Gemmology’, ‘Jewellery Industry Voices’ and ‘Mine to Design’. • Gem-A (London) has produced a series |  | | Report (volume) | | according to the type locality Piemont in Northern Italy. The first Cr rich epidote occurrence was described...in zoisite; sample HU93-8 from Sterzing, Tauern/Italy; photomicrograph with crossed polarized light (c)...REE-bearing piemontite from Monte Brugiana, Alpi Apuane, Italy. Eur J Mineral 4:23–34 Bonazzi P, Menchetti S (1995)...the epidote group, from Val Graveglia, Liguria, Italy. Eur J Mineral 2:519-523 Bonazzi P, Menchetti S...Cordier L (1803) Analyse du Minéralconnu sus le nom de Mine de Manganese violet du Piédmont, faite au Labratoire |  | | Book | | Kristalle siche unter Bergwerk, Mine, Grube (in Betrieb) Bergwerk, Mine, Grube (außer Betrieb) Durchmesser...Nationale Superieure des Mines, 60, boule- 77/6/8) Mine v. „Les Chalanches“ (HF): Allemontit, Amalgam, Antimon...Frankreich. - (W. Ally: (Hautc-Loirc) (Mich. 76/5/8) Mine b. „La Barraque“: Antimonil, Baryt (33/13). Noltcmcycr...Bains d’Avene: (Herault) (Mich. 83/4/3) N v. B. Cu-Mine „des Clauzcls“ (X) Azurit, Baryt, Bournonit, Chalkopyrit...Malachit, Quarz; NW d. Ortes X Mine „de Mayus“: spärlich Goe thit; NW v. B. X Mine „de Bournac Remise“ Arseno |
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Praborna Mine, Saint-Marcel, Aosta Valley, Italy