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Opal from
Mont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France


Locality type:Mountain
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Offretite1 photo of Opal associated with Offretite at this locality.
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Mont Semiol, Châtelneuf, Montbrison, Loire, Auvergne-Rhône-Alpes, France
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:141489
Long-form Identifier:1:3:141489:9
GUID (UUID V4):5cfe690e-710f-4542-8843-cc0a837212ea
Nearest other occurrences of Opal
36.2km (22.5 miles) Le Crêt, Saint-Priest-en-Jarez, Saint-Étienne, Loire, Auvergne-Rhône-Alpes, France
50.0km (31.1 miles) Gourniaud Mine, Lachaux, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
50.6km (31.5 miles) Bigay Mine, Lachaux, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
52.6km (32.7 miles) Roffin Mine, Lachaux, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
52.9km (32.8 miles) Reliez, Ris, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
53.0km (32.9 miles) Prudeux, Saint-Babel, Issoire, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
53.1km (33.0 miles) Etang de Reliez, Lachaux, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
53.5km (33.3 miles) Gagnol Mine, Ris, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
53.8km (33.4 miles) Bancherelle Mine, Ris, Thiers, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
57.4km (35.7 miles) Puy du Mur Quarry, Mur-sur-Allier, Clermont-Ferrand, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
ser. 3, 10, 385. A mixture of ~ nontronite and ~ opal-cristobalite. Not to be confused with the Chloropal...grains with arsenic and realgar at Duranus, Alpes Maritimes, France, are orthorhombic, a 3"576, b 6"759, e...12"820, C 6"69I A, occurs in the nepheline syenite of Mont-St.-Hilaire, Quebec. Named for Gabrielle Donnay...pale-brown trigonal crystals (a Io'556, c I5"85I A) from Mont-St.-Hilaire, Quebec, previously listed as ROM I...in the black dolomites of Jas Roux, Hautes-Alpes, France, are monoclinic, a II"484, b 14-o2o, c 6"388
Book
Scolecite 41 Fig. 1.1H. Natrolite from Auvergne, France (x4) Fig. 1.11. Partially ordered natrolite...in the basalt from Puy de Marman, Puy-de-Dome, France (see also Pongiluppi 1976); - in the basic volcanic...in a doleritic basalt from Gignat, Puyde-Dome, France, in honour of F. Gonnard. Hey (1932a) showed that...in vugs of massive rocks (mostly basalts) are: France: Chaux de Bergonne, Gignat, Puy-de-Dome with thomsonite...Maze, Nii~ata 7. Halap Hill, + 5.1 2.27 France (Meixner 1. 3 (Hey, et aI., 1932a) 1956)
Book
mineralogy was done, at that time, in Germany, Italy, France, and Great Britain. Because of differences in language...containing fresh glass, montmorillonite clay, and opal; a transition zone (up to 20 mOl thick) composed...(up to 12 meters thick) that contains fresh glass, opal, and montmorillonite; a middle zone (up to 10 meters...the flow. In the Plateau des Coirons, Ardeche, France, zeolites are present only where the basalt flowed...spring areas. Chabazite, phillipsite, natrolite, opal, chalcedony, calcite, apophyllite, and plombierite
Book
mineralogy was done, at that time, in Germany, Italy, France, and Great Britain. Because of differences in language...containing fresh glass, montmorillonite clay, and opal; a transition zone (up to 20 mOl thick) composed...(up to 12 meters thick) that contains fresh glass, opal, and montmorillonite; a middle zone (up to 10 meters...the flow. In the Plateau des Coirons, Ardeche, France, zeolites are present only where the basalt flowed...spring areas. Chabazite, phillipsite, natrolite, opal, chalcedony, calcite, apophyllite, and plombierite
Journal (article/letter/editorial)
Ercit and Van Velthuizen (1994). Type locality: Mont Saint Hilaire, Quebec, Canada. Named after Robert...locality Chaux de Bergonne, Gignat, Puy-de-D6me, France. Named after Ferdinand Gonnard, who had earlier...basalt near top of Mont Semiol, south slope, near M o n t b r i s o n , Loire, France. N a m e d after...as offr6tite. Type locality: Mont Simionse (Mont Semiol), Loire, France. Named after Albert J. J. Offret...Offret, professor in the Faculty of Sciences, Lyon, France. Ca, Mg, and K substantial, commonly in proportions
Book (edition)
polished, 70 mm, Anjanabonoina, Madagaskar, G Page 5: Opal - fire, polished, 50 mm, Mezezo, Ethiopia, G Page...greenish tint. R = 35 %. VHN = 26-61. Rare at etc. at Mont St-Hilaire. Quebec. CM 32. 843-854, Georgetown,...Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite Sn2 /•O6'OH) 14Cl 1,, (3.D). Trigona]...occurs mainly in the Alps between Monte Cenis and Mont Blanc, as well as in Val Malenco, Lombardy, Italy... {100} and {010} Colfax co., New Mexico, and at Mont St-Hilaire, good.H = 3. D = 227. Np,m,g= 1.480.1
Journal (issue)
........... $1.00 per lb. Opal, Mexico. black plumes in salmon color opal..............................We special i ze in the finer grades of opal ond crystal opal. Do not be deceived by price structures...paper. The proof is in the qua lity ond price of the opal ond the guarantee by which we stand behind our merchandise...merchandise. We hove been mining and dea l i ng in opal for 8 years and integri ty and qual ity are what....... ......... ~ ~ COMMERCIAL TROPHIES t ~ Opal far the Cannaissnr $300- $1200 per ounce- 5 to 28
Journal (issue)
Associate Editors Pierre Bariand Sorbonne Paris, France Bill Birch Museum of Victoria Melbourne, Australia...Scovil Phoenix, AZ Pierre-Nicolas Schwab Orléans, France July–August 2005 Volume Thirty-six, Number Four...Associate Photographers Nelly Bariand Sorbonne Paris, France Dan Behnke Northbrook, IL Werner Lieber Heidelberg...chabazite, columbite, euxenite-(Y), gibbsite, nacrite, opal (hyalite), pyrophyllite, talc, ferberite and zircon...silicacarbonate rocks of the Clear Creek mine. Opal SiO2⭈nH2O Opal occurs as vein-filling masses throughout
Book
green. Vilate quarry, Chanteloube, Haute-Vienne, France. H= 5-5.5, Djn=3.45, Dc=3.62, VHA 05b. Damour,...pink, greenish, etc. Montebras, Soumans, Creuse, France. H= 5.5-6, Djj4=3.11, D(,= 3.21, VIIB 02. Breithaupt...grey in reflected light. Argut Plane, Pyrenees, France. H=?, Djn=?, D(.= 6.28, IVD 02. Johan et ah, 1983... Romaneche-Thorins, Macon (near), Saone et Loire, France. H=4.5, Dj4j=3.60, D(,= 3.60, VIID 15a. Dufrenoy...Saint-Symphorien-de-Marmagne, Autun, Saone-et-Loire, France. H= 2-2.5, Djjj=3.1, D(;=3.14, VHD 20a. Brooke
Book (edition)
Data on new occurrence al Saint Pandclon. Landes. France. by B. Azambre and P. Monchoux ( 1 988) 8111/....by A . Des Cloizcaux ( 1 884) 8111/. Soc. Min. France, 1. 72. proved to carry two minerals. a manganiferous... 1 3 A . Z= l 6 [PDF 25-630) . (TI..) Margnac. France. Named for H . Agrin icr. Agstein. syn. of amber...shown to be a mixture of Ni(OH)2 • gibbsitc. and opal by G.S. Grit7�1cnko. N.K Aidinyan and V.P. Butuzov...tite I). Sec also Paradocrasitc. (TL) Allemont. France. Named for locality . S yn. Arsenikantimon. Arsenikspiessg
Book
Guay graphistes Sérandite, Analcime and Natrolite, Mont Saint- Desktop Publisher Info 1000° Mots inc. ...chemical component — anion or néche, Sadne-et-Loire, France, or annite, after Cape anionic radical. Thus...HAbvY, R.-J. (1801): Traité de Minéralogie. Paris, France. HILL, J. (1748): History of Fossils. London,...B.L. (1772): Essai de Cristallographie. Paris, France. SCHALLER, W.T. (1930): Adjectival ending of chemical...people of the discovery area. Poudrette quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada.
Book (edition)
opalescence Somewhat pearly luster such as shown by some opal. opaque Property of being impervious to visible...Greece. Other occurrences are found in Chile, Italy, France, Germany, Turkey, and Algeria. SELECTED REFERENCES:...Arkansas, Minnesota, and Massachusetts. Also at Mont St. Hilaire, Quebec, Canada, and at localities in...‘‘gummite’’ at Margnac, in the Massif Central, France. SELECTED REFERENCE: Cesbron, F., et al., Min....counties, Arizona; and at deposits in Mexico, Canada, France, Bulgaria, Czechoslovakia, and elsewhere. SELECTED
Book (edition)
opalescence Somewhat pearly luster such as sho,vn by some opal. opaque Property of being impervious to visible...Greece. Other occurrences are found in Chile, Italy, France, Germany, Turkey, and Algeria. SELECTED REFERENCES:...Arkansas, Minnesota, and Massachusetts. Also at Mont St. Hilaire, Quebec, Canada, and at localities in...in "gummite" at Margnac, in the Massif Central, France. SELECTED REFERENCE: Cesbron, F., et al., Min....counties, Arizona; and at deposits in Mexico, Canada, France, Bulgaria, Czechoslovakia, and elsewhere. SELECTED
Book
with uranophane in cavities in gummite at Margnac, France. Composition 8[2(K2,Ca,Sr)0.6U03.8H20]. a || [001]... p. 1426). The same as ajkite (Bull. Soc. Min. France, 1878, vol. 1, p. 126; abstract from . ..?). A...2111] Angelardite. A. Lacroix, Mineralogie de la France, 1910, vol. iv, p. 524. The correct form of anglarite...Anglar), in the commune of Compreignac, Haute-Vienne, France. A blue, hydrated phosphate of iron usually identified...distinct from the original autunite from Autun in France. It is monoclinic with the probable composition
Report (volume)
Gaultite, a new zeolite-like mineral species from Mont Saint-Hilaire, Québec, and its crystal structure...sphalerite, and cinnabar), silica minerals (quartz, opal, chalcedony, tridymite, and cristobalite), ettringite...other authigenic phases (feldspar, calcite, quartz, opal, tridymite, cristobalite, thaumasite, gypsum, thenardite...heulandite, levyne, chabazite, okenite, calcite, opal, and native copper (Boggs et al. 1993); and the...prehnite, apophyllite, datolite, quartz, chalcedony, opal, pyrite, chalcopyrite, searlesite, and borax. It
Report (volume)
parallel Figure 19. (a and b) Mazzites from Mt. Semiol, France. Both photos from Gottardi and Galli (1985)...19a). It has been found only at Mont Semiol, Montbrison, Loire, France where it occurs as a hydrothermal...alunite, pyrite, sericite, chalcedony, allophane, opal, cristobalite, sulfates, and residual feldspar....Effects of Mineral Fibres, p. 69-78. IARC, Lyon, France Giese R.F., Jr. (1988) Kaolin minerals: Structures...cation-exchange capacity of talc and chlorite from Trimouns, France. Proc. Int'l Clay Conference, Denver, Schultz,
Book
MONT SAINT-HILAIRE: HISTORY, GEOLOGY, MINERALOGY About the cover The striking specimen shown on...specimens collected at Mont Saint-Hilaire; it features the species that made Mont Saint-Hilaire so well...cover feature two species originally described from Mont Saint-Hilaire; they remain unique to that locality...Monteregianite is named after the Monteregian Hills, of which Mont Saint-Hilaire is a member; carletonite is named...Carleton University, where much of the early work on Mont Saint-Hilaire minerals was carried out. The monteregianite-(Y)
 
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