 | | Journal (article/letter/editorial) | | associated minerals include calcite, dolomite, quartz, clinozoisite, wollastonite, scapolite, vesuvianite...white, and pink crystals. Sizes of Jeffrey grossular vary by color. The largest crystals, some to 5 cm in...the 1950s in rodingite. The crystals of grossular vary in size from a few millimeters to approximately...modified dodecahedra associated with clinozoisite, quartz, and diopside (King and Foord 1994). There is a...Figure 12. A 14-cm-high specimen of grossular in quartz from the Pitts-Tenny quarry, Minot, Androscoggin |  | | Journal (article/letter/editorial) | | we studied soils on a mofette site in the Czech Republic at three spots differing in the partial pressures...Italian Tuscany, the German Eifel Mountains or the Czech Eger Rift). In soils developed on such sites, CO2...x 113 The study site is located in the NW Czech Republic, 10 km E of Františkovy Lázně on the floodplain...so that primary and secondary minerals such as quartz, feldspars, micas, chlorite, smectite, illite and...soil-forming sediments. However, near the village of Hazlov (approx. 20 km away from the study site and upstream) |  | | Journal (article/letter/editorial) | | Kaolinite Georgia med crystall. n Kaolinite Karlovy Vary, CSSR nominal Buenavista, Cuba Al,SiO- n Kyanite...i76Cri 0 Si 280 O 12 Quartz Hot Springs, AR SiO 2 n Quartz Hot Springs, AR SiO2 n Quartz Black Hills Peg.... SiO2 n SiO2 n Quartz Hot Springs, AR Quartz synthetic SiO 2 n Quartz Dolni Bory, CSSR SiO 2 n Pulaski...Tungsten Wn synthetic Llano, TX nominal Vermiculite Hazlov, CSSR (next line) Vesuvianite Ca 835 Mg 42 Fe 79...1989. RIR's converted from quartz analytical base with I/I c of 2.99 for quartz for 25/75, 50/50, and 75/25 |  | | Book | | known to humankind since prehistoric times such as quartz and gold, but also minerals first described quite...extraordinary influence to several generations of Czech and Slovak mineralogists and mineral collectors...long were also found in Pribram and Jachymov, Czech Republic. Dendritic aggregates from Batopilas, Chihuahua...secondary. It occurs with pyrite, arsenopyrite, quartz, sylvanite. calaverite. krennerite and other minerals...in many localities in California, USA (Colorado Quartz mine. Nigger Hill and others). Fine leaf gold comes |  | | Book | | known to 1umankind since prehistoric times such as quartz 1nd gold, but also ~minerals first described quite...extraordinary influence to several generations of Czech and Slovak mineralogists and mineral collectors...long were also found in Pribrarn and Jachymov, Czech Republic. Dendritic aggregates from Batopilas, Chihuahua...mm (4 in) was made in Krepice near Vodnany, Czech Republic. Application: practically the only source of...secondary. It occurs with pyrite, arsenopyrite, quartz, sylvanite, calaverite, krennerite and other minerals |  | | Journal (article/letter/editorial) | | background for the Cu and Zn peaks, corundum for Si, and quartz for all other elements. Beam-current drift corrections...trivalent. prismatic to equant, and occurrences vary. T he specimens analyzed by Itoisch (1985) fall...Zermatt, Switzerland NMNH B 2 0 8 3 7 red-brown 3.6 Hazlov, Czechoslovakia NMNH 115461 brown 3.7 Olmsteadville...indicating some substitution of Mn for Ca. Our results vary slightly from those of Hoisch (1985), who found...(1972) An antimonian idocrase from the Bau mining district, Sarawak, Malaysia. Min Mag 38: 894-896 Burns |  | | Book | | étoile, de l'eau (flocons de neige). Cristal de quartz, asymétrique. grad, le g_éologue Sobolev qui,...généralement des grains incolores de quartz et des paillettes de mica. Le quartz et le mica sont des minéraux...diverses. On trouve souvent sous forme de druses le quartz, la calcite, la fluorine, la barytine etc. On rencontre...produisent de grands cristaux, comme, par exemple, le quartz. " En minéralogie et en pétrographie, on désigne...diamant en possède plusieurs et que le clivage du quartz est impossible. La dureté, c'est-à -dire la résistance |  | | Book | | distinguish Fig. 1. A druse of quartz crystals * Fig. 2. Quartz crystals; combination of two rhombohedra...crystallize in this system: beryl, apatite, ‘high’ quartz (beta quartz), nepheline, pyrrhotite, molybdenite, niccolite...e.g. calcite, dolomite, siderite, ‘low’ quartz (alpha quartz), corundum, tourmaline, haematite, cinna-...after native copper, of cuprite after azurite, of quartz after barytes, and of pyrite after calcite. If...physical properties of certain minerals may also vary according to the direction from which they are handled |  | | Book | | distinguish Fig. 1. A druse of quartz crystals 8 Fig. 2. Quartz crystals; combination of two rhombohedra...crystallize in this system: beryl, apatite, 'high' quartz (beta quartz), nepheline, pyrrhotite, molybdenite, niccolite...e.g. calcite, dolomite, siderite, 'low' quartz (alpha quartz), corundum, tourmaline, haematite, cinnabar...after native copper, of cuprite after azurite, of quartz after barytes, and of pyrite after calcite. If...physical properties of certain minerals may also vary according to the direction from which they are handled | | | Book | | disti9guish Fig. 1. A druse of quartz crystals 8 Fig. 2. Quartz crystals ; combination of two rhombohedra...crystallize in this system: beryl, apatite, 'high' quartz (beta quartz), nepheline, pyrrhotite, molybdenite, niccolite...e.g. calcite, dolomite, siderite, 'low' quartz (alpha quartz), corundum, tourmaline, haematite, cinnabar...after native copper, of cuprite after azurite, of quartz after barytes, and of pyrite after calcite. If...physical properties of certain minerals may also vary according to the direction from which they are handled |  | | Book (edition) | | andreprodu<..1ion by StudioVVG, Prague Printedin Czech Republicby Finidr.u.o .. Ce,ky Te~in 14/02/03/0...Publishing House in Prague and which recei\ ed the Czech Literary Award for best book in the natural sciencesfor...very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...and other Larin Ianguages. and in the- Polish. Czech, Greek, Hungarian, Finnish. and Swahili Ianguages...the triclinic system. The lattice constants may vary somewhat for the same mineral due to chemical composition |  | | Book | | Several specimens of a particular mineral, e.g. quartz, may vary not only in colour (see plates) but also in...graphite. The basic element of the commonest mineral — quartz — is silica (SiO,), a compound of silicon and oxygen...— some 40-50 — are generally rock-forming, e.g. quartz, felspar, mica, pyroxene, amphibole and olivine...At a later stage they often become filled with quartz, agate or chalcedony. The largest part of the gases...walls of the fissures. Well known minerals, such as quartz and calcite, originate at this stage and are known | | | Book | | Several specimens of a particular mineral, e.g. quartz, may vary not only in colour (see plates) but also in...graphite. The basic element of the commonest mineral quartz — is silica (SiO2), a compound of silicon and oxygen...— some 40-50 — are generally rock-forming, e.g. quartz, felspar, mica, pyroxene, amphi bole and olivine...At a later stage they often become filled with quartz, agate or chalcedony. The largest part of the gases...walls of the fissures. Well known minerals, such as quartz and calcite, originate at this stage and arc known |  | | Book | | rock-forming minerals, among the commonest being quartz, feldspars, amphiboles, pyroxenes, micas, olivine...in CaO, FeO and MgO. They are mostly composed of quartz, feldspars, micas and, occasionally, of pyroxenes...minerals of economic value, such as feldspars, quartz and micas, often in crystals of considerable size...the hydrothermal formation of such minerals as quartz, dolomite and calcite. If elements of heavy metals...ilmenite. Lighter, non-metallic minerals, such as quartz or feldspars, may also be found in large deposits | | | Book | | rock-forming minerals, among the commonest being quartz, feldspars, amphiboles, pyroxenes, micas, olivine...in CaO, FeO and MgO. They are mostly composed of quartz, feldspars, micas and, occasionally, of pyroxenes...minerals of economic value, such as feldspars, quartz and micas, often in crystals of considerable size...the hydrothermal formation of such minerals as quartz, dolomite and calcite. If elements of heavy metals...ilmenite. Lighter, non-metallic minerals, such as quartz or feldspars, may also be found in large deposits |
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