 | | Journal (issue) | | • Email: info@kristalle.com Harz Mountains, Germany by Günter Grundmann Thomas P. Moore Wendell E... Moore COVER: PROUSTITE, 3.5 cm, from St Andreasberg. Germany, found in 1899; ex collection of Richard... Contents The St. Andreasberg Mining District, Western Harz Mountains, Niedersachsen, Germany .............(Simonin, 1869). The Mining District Western Harz Mountains Niedersachsen, Germany Günter Grundmann Eschenweg...minrecord@comcast.net The geographically tiny St. Andreasberg District of silver mines has an outsized reputation: |  | | Book | | Vienna. Lower left: Cobaltocalcite group. from Lerida. Spain. Folch collection. Barcelona. Lower right:...Netherlands. Back cover The museum ldar-Oberstein. West-Germany. is quaintly situated beneath the Felsenkirche...Copyright 1986 by . Ulrich Burchard, Lalling, West-Germany All rights reserved including the right of reproduction...Printed in Germany Miscellaneous: Design & Lay Out by Rainer Bode, Haltern, West-Germany Type set by...Wurzburg, West-Germany Colour separations by Litho Thungen GmbH, Thungen, West-Germany H. Bari, Musee |  | | Report (issue) | | veins); zeolites, chalcedony, “chlorite” (vesicles); talc, tremolite, grossular, quartz (metamorphic); nepheline...Liskeard, Cornwall. From St. Andreasberg, Harz Mountains, and Freiberg, Saxony, Germany. At Herja (Kisbánya)...Baia Mare (Nagybánya) district, Romania. In the USA, from Rossie and Balmat, St. Lawrence Co., New York;...Picher, Ottawa Co., Oklahoma, in the Tri-State district; from the Elmwood mine, near Carthage, Smith Co |  | | Journal (issue) | | or individual specimens. CRYSTAL CLASSICS 465 W St Marys Rd, Tucson, Arizona 85701 crystalclassics.co...Balmat, St Lawrence County, New York, USA Photo Credit: T Spann DYLAN STOLOWITZ 4 2 7 Main St reet |...County, California Mark Ivan Jacobson 1714 S. Clarkson St. Denver, CO 80210 markivanjacobson@gmail.com The...the specimen. The future dragon’s head is to the lower right with future feet on the left. Note the temporary...glue coating the outermost matrix rock face on the lower left to reduce vibration damage during transport |  | | Book | | look for. Michael O’Donoghue Proustite (East Germany) 7 Rocks We can define a rock as a large mineral...cations. This group includes the micas, clays, and talc. Minerals of this group are easily split into thin...Feldspar 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc All that the scale tells us is that mineral no....the fixed index (the ordinary ray) at a higher or lower reading than the moveable (extraordinary) ray. Where...incident beam are retarded by passing through to the lower side of the film, rejoining the main beam either |  | | Book | | specific gravity are again defined as groups for the lower section of the multicolored margin bar. As many...minerals as possible are included in each group. The lower section of the margin bar is fitted with a scale...Mineral SimEle testing devices 1 2 3 4 5 6 7 talc gypsum calcite fluorite apatite orthoclase quartz...crystals, and weathered surfaces can give a false lower hardness. After the test scratch, a po}Vder-like...zircon and sphene, where double refraction at the lower edge of the crystal can be observed with the naked | | | Book | | specific gravtly are again defined as groups for the lower sectton of the mulucolored margin bar. As many minerals...minerals as possible are mcluded m each group The lower section of the margm bar is fitted w1th a scale...SCALE Mohs' hardness l 2 3 4 5 6 7 8 9 10 Mineral talc gypsum calcite fluorite apatite orthoclase quartz...crystals. and weathered surfaces can g1\'e a false lower hardness After the te\l scratch, a powder-hke residue...zircon and sphene, where double refraction at the lower edge of the crystal can be observed with the naked |  | | Book | | immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...culture, derives its name from the saltmining district of Hallstatt in Upper Austria, where many prehistoric...of these fourfold axes in all. The considerably lower symmetry of a monoclinic crystal is shown in Fig...crystallographic symmetry of a body may often be lower than its apparent geometric symmetry. In a pyrite...symmetr:y ar:e no longer: present (Fig. 16a, p. 93). A lower: cr:ystallogr:aphic symmetr:y is often only shown | | | Book | | one that will again defined as groups for the lower sec- 2< make a positive identffica- tion of the...characteristic—also weight of a specific mate- The lower section of the margin bar is rial compared with...Mineral Simple testing devices 1 2 3 4 5 6 7 8 9 10 talc gypsum calcite fluorite apatite orthoclase quartz...crystals, and weathered surfaces can give a false lower hardness. Metal holders in which mineral chips...Tarnish, discolorations, and weathering tion at the lower edge of the crystal can be observed with the naked | | | Book | | specific gravity are again defined as groups for the lower section of the multicolored margin bar. As man y...minerals as possible are included in each group. The lower section of the margin bar is fitted with a scale... SimEle tes ting devices 1 2 3 4 5 6 7 8 9 10 talc gypsum calcite fluorite apatite orthoclase quartz...crystals, and weathered surfaces can give a false lower hardness. After the test scratch, a powder-like...zircon and sphene, where double refraction at the lower edge of the crystal can be observed with the naked |  | | Book | | results in a pseudo-symmetry, i.e. crystals of lower symmetry are twinned in such a way that they form...examples for the hardness tests is as follows: 1. talc 6. orthoclase felspar 2. gypsum 7. quartz 3. calcite...between that of the sample and that of the next lower grade. In this case we consider the hardness to...Different scratch hardness on kyanite 20 somewhere lower grade adding a half-grade to it. Although the determination...fibrous and porous aggregates often seem to have a lower hardness because of the blank spaces between individual |  | | Book | | alignment of pl aty minerals under the surface, as in talc and mother-of-pearl Silky like silk, due to an underlying...(note: it has no units). contrast to the diamond, Talc is the softest mineral, it is the lowest 011 Mob's...largest group are further subdiv ided according to st ructure. All silicates are based on the 'silicate...(420 tons); others localities include Mansfeld (Germany), Bisbee (Arizona), Tsumeb (Namibia) and Surra...native sliver include Kongsberg (Norway), Freiberg (Germany), Jachymov (Czech Republic), the Comstock Lode | | | Book | | alignment of pl aty minerals under the surface, as in talc and mother-of-pearl Silky like silk, due to an underlying...(note: it has no units). contrast to the diamond, Talc is the softest mineral, it is the lowest 011 Mob's...(420 tons); others localities include Mansfeld (Germany), Bisbee (Arizona), Tsumeb (Namibia) and Surra...native sliver include Kongsberg (Norway), Freiberg (Germany), Jachymov (Czech Republic), the Comstock Lode...(Italy), ldrija (Slovenia), Moschellandsberg (Germany) and Juan Cavelica (Peru). Almaden Is the oldest |  | | Journal (article/letter/editorial) | | Terlingua, Texas; Mt. St. Hilaire, Quebec; Sierra, Gorda, Chile; and Schneeburg, Saxony. Nearly complete suites...42: Magnetite octahedron and pyrite cube, Calton Talc mine, Chester, Vermont (8.5 cm). Figure Figure...catapleiite with epididymite, De-Mix quarry, Mt. St. Hilaire, Quebec (3.5 cm). Figure 52: Dark blue...Black mass of samsonite crystals, St. Andreasberg, Harz Mountains, Germany (4.3 cm). Figure 54: Light yellow...pyrargyrite crystals from Schneeberg, Niederschlema, Saxony (7 cm). 62 ROCKS AND MINERALS Figure 74: Lustrous |  | | Report (issue) | | clays............................. Pyrophyllite and talc................................. Bibliography....................... Analyses of pyrophyllite and talc...................................................described by Dufrenoy (1856, p. 583), from Confolens, at St. Jean-de-Cole near Thiviers, France, and delanonite...in silica, up to at least 5:1, while others are lower, reaching 3:1 or even 2:1, without change in structure...that have been described as smectite from Cilly, Lower Styria, and Woburn Sands of England are typical |  | | Book | | Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...is harder and the test may proceed to the next lower grade. Not much force on the scratching point is...proportion Rosiwa l 100 1000 10 000 100 000 talc gypsum calcite fluorite -- apatite orthoclase...aggregates or weathered minerals have usually a lower hardness than the single or unaltered crystals of...For instance, hematite (hardness 6) will have a lower hardness in the radiating or earthy form than in |  | | Catalog/List | | this substance. 8. L. Hallein, 9. L. Hallein, Lower Lower Austria. Fibrous. Austria. Lamellar, color...numerous TiO. fibrous. Coarsely granular. 45. L. Saxony. Sp, 2. Compactly Coarsely fibrous. Scotia...purple crystals. Chaux fluatee bor- dee. H. 57. L. St. Agnes, Cornwall. Purple and white. planes which...and iron pyrites. 63. L. Johann Georgenstadt, Saxony. In greyish yellow cubes, invested by sulphate...of carbonate of lime, and iron pyrites. 64. L. Saxony. In g.eenish white cubes, intermingled with | | | Book | | Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...is harder and the test may proceed to the next lower grade. Not much force on the scratching point is...aggregates or weathered minerals have usually a lower hardness than the single or unaltered crystals of...For instance, hematite (hardness 6) will have a lower hardness in the radiating or earthy form than in...some differences. Transparency may also become lower because of mechanical effects — small rifts often |  | | Book | | gré des techniques. C'est ainsi que les filons de St-Joachimsthal en Bohême ont été exploités tour à tour...l'annabergite (du bourg minier d' Annaberg dans le district du Erz). Certains noms, de consonnance latine...pseudomorphoses GALÈNE District minier du Siegerland (Allemagne) GALÈNE Gisement du district minier de Neudorf...Géologie et district minier des Carpathes Gisements du massif schisteux rhénan District minier de Freiberg...Freiberg (Saxe) District minier de Schneeberg (Saxe) Gisements stratifiés de cobalt Genèse de la pyrite |  | | Journal (article/letter/editorial) | | Lagerstattenbildung, Telegrafenberg A 50, D-14473 Potsdam, Germany ¨ b UniÕersitat ¨ Potsdam, Institut fur ¨ Geowissenschaften...Geowissenschaften, Telegrafenberg C 7, D-14473 Potsdam, Germany Abstract Pyrites from various occurrences and...opaque opaque 0 0 0 – – – marls shales sediments talc slate marls black shales metamorphites cube cube...pyrite framboid ŽHarz Mts., Germany.; no. 2—Reiche Zeche ŽFreiberg, Germany.; no. 3—Zechstein-hosted pyrite...4—Valdeparillo ŽSpain.; no. 5—Rammelsberg ŽHarz Mts., Germany.; no. 6—Isola Elba ŽItaly.; no. 7—Mazowe Mine ŽHarrare |  | | Book | | attitude to life. Marcasite. 100 mm. Misburg. Germany 7 i 1. Elements Copper. 42 mm. Cornwall, UK...: Vie in) were found Silver. 52 mm. Freiberg. Germany Copper. 120 mm. Keweenaw Peninsula. U.S.A. in...have been found. Silver, 55 mm. Schwarzwald. Germany Beautiful specimens of wire silver with wires...are known from Freiberg, Schneeberg and St. Andreasberg, Germany. Wires several cm long were also found...industry, measuring instruments, metallurgy. Germany. They are also known fioin Sala, Sweden; Les Chalanches |  | | Book | | peg1natites and T, \farcasite, I 00 mm, Mis burg, Germany meteorites); 2. sedimentary, when a mineral crystallizes...('3/i6in) were found Silver, 52 mm, Freiberg, Germany Copper, 120 mm, Keweenaw Peninsula, US.A. in Dzhezkazgan...have been found . Silver, 55 mm. Schwarzwald, Germany 10 Beautiful specimens of wire silver with wires...are known from Freiberg, Schneeberg and St. Andreasberg, Germany. Wires several cm long were also found...industry, measuring instruments, metallurgy. Germany. They are also known from Sala. Sweden; Les Chalanches |  | | Journal (issue) | | Institute of Romania Essaid Bilal, Ecole des Mines, St. Etienne, France M. S. Pandian, Pondicherry University...Metaliferi Mts. 15 4. Baia Mare metallogenic district 64 5. Other sources of native gold from Romania...and engineering staff, many of them educated in Germany. The collection has been added with new gold specimens...exhibited at the Mining Museum in Heidelberg – Germany. Numerous samples illustrate a variety of assemblages...unit. For instance, in BradSăcărâmb metallogenic district, the Au:Ag ratio is relatively uniform (45% to |  | | Book | | localities include St. Andreasberg, in the Harz/F.R.G.; Freiberg, SChneeberg, and Annaberg in Saxony; Pfibram and...Other important deposits are found in the Cobalt district of Ontario, Canada, as well as in Mexico and Bolivia...in the sedimentary copper deposits at Mansfeld, Germany. Other than in jewelry and silverware, its main...secondary deposits were discovered in the area of the lower Tunguska, Siberia, in 1948, and in 1954 the first...very important deposit has been the Tri-state district (Oklahoma, Kansas , and Missouri , U. S.A.). The | | | Book | | results in a pseudo-symmetry, i.e. crystals of lower symmetry are twinned jn such a way that they form...hardness tests is as 6. orthoclase felspar follows: 1. talc 2. gypsum 7. quartz 8. topaz 3. calcite 4. fluorite...that of the next lower grade. In this case we consider the hardness to be of the lower grade adding a half-grade...fibrous and porous aggregates often seem to have a lower hardness because of the blank spaces between individual...sound when hit with a hammer. Soft minerals like talc or graphite split into powder under a hammer blow |
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