 | | Journal (issue) | | 393 by A. H. Kazmi, J. J. Peters and H. Obodda Nepal The tourmalines of N e p a l......................localities: the Himalaya dike system, Mesa Grande district, California (by E. E. Foord) [1977, vol. 8, no...Eichholz’s translation, 1971) “Caria” is an ancient district in southwestern Asia Minor. The In dian stones...Figure 4. Achroite or colorless tourmaline with quartz crystals from St. Just, Cornwall (from Sowerby’s...Mica (1895). Piezoelectricity in tourmaline and quartz was discovered by the Curie brothers in 1880, and |  | | Catalog/List | | 10:00 AM – 5:00 PM CT Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Session...5:00 PM ET LOT VIEWING Heritage Auctions Design District Annex 1518 Slocum Street • Dallas, TX 75207 Thursday...‘normal’ habit, often in conjunction with euhedral Quartz crystals. The potential for new discoveries and...grow. 73001 TOURMALINE Momeik Township, Kyaukme District, Shan State, Myanmar (Burma) Looking almost like...com/6150 73002 TOURMALINE Momeik Township, Kyaukme District, Shan State, Myanmar (Burma) For those that have |  | | Journal (article/letter/editorial) | | Madagascar, Russia, Mozambique, the United States, Nepal, and the Democratic Republic of the Congo. Yellow...compositions of similar material from Nepal (Sankhuwa Sabha District) and the Democratic Republic of the...tourmaline, but also other colors (Madagascar, Russia, Nepal, Italy); and (3) rare yellow tourmaline with mainly...survey of mn-rich yellow tourmaline in the Lundazi District of eastern Zambia (Fig. 1a). Tourmaline has been...is relatively simple, consisting of feldspars, quartz and very abundant schorl. Rare Nb–Ta oxides also |  | | Journal (article/letter/editorial) | | (agate, amethyst, citrine, emerald, quartz, rose quartz, smoky quartz, morganite, and aquamarine, beryl)...1). All but three gemstones (varieties of beryl, quartz modifications, amber) are heavy minerals by definition...range of the most common rock-forming minerals, quartz, plagioclase, alkaline feldspar, and calcite) (Table...minerals feldspar s.s.s. (=solid solution series), quartz, phyllosilicates, and carbonate minerals as main...gemstones from the diluting thrash or gangue minerals (quartz, feldspar) by their different specific gravities |  | | Journal (issue) | | jade [both jadeite and nephrite], opal, peridot, quartz, spinel, tanzanite, topaz, and tourmaline). Locality...They built fires under massive aquamarine-bearing quartz bodies, and then threw water onto the heated rock...decade, sources in India (both in Orissa and Andhra Pradesh) provided new discoveries of green cat’s-eye chrysoberyl...1999b). The ruby occurrences in Malawi, Russia, Nepal, Afghanistan, Pakistan, and China have had little...$25 to $45/ct for “good” and “fine” 3 ct stones). Quartz—Amethyst. Synthetic amethyst plagued the industry |  | | Report (issue) | | a peculiar quartz-diopside rock type that consists of ab solutely white diopside, quartz and calcite...phengite, tainiolite, vanadium-bearing muscovite, quartz and dolomite from the Onega depression, Central...Bronze-brown; streak: yellow-brown; luster: vit district Corinthia in Austria and Slovenia, dravite is...A 32.8 cm tall elbaite specimen with associated quartz and albite from Pech, Afghanistan. Bruce Oreck...and Parafba, Brazil; Sahatany Valley pegmatite district in Madagascar; Nigeria; Namibia; Nuristan Valley |  | | Journal (issue) | | important collector species in the Untersulzbachtal are quartz crystals, titanite, apatite, aquamarine beryl,...also the site of a centuries-old copper mining district, more or less dormant since the middle 1800s....around Bischofshofen, St. Georgen and Saalfelden. Quartz crystals (most probably from the Hohe Tauern) have...Massif granite and gneiss ty, s' “Fensterrand” (quartz phyllite, graywacke, old crystalline rocks) Figure...Local enrichments of biotite, titanite, albite and quartz are known; and rare, very localized beds rich in |  | | Journal (issue) | | origin of color in two common varieties of quartz: smolzy quartz and amethyst. In all smolzy q;artz crystals...visible range and induces the typical smolzy color. Quartz will become completely black if the radiation is...aluminum. On heating, the smolzy color leaves and the quartz returns to its original colorless state. In amethyst...initial impurity. Fe3+ occupying the silicon site in quartz is changed by irradiation into Fe4 +,an uncommon...yellow-green. Fe and A1 are common impurities in quartz. Less common foreign molecules can also produce |  | | Journal (issue) | | what was previously known as the Saint-Michel district, and is now part of the Arrondissement de Vil...quarry should read Francon quarry, Saint-Michel district, Montréal, Québec, Canada. In some publica- 1...magnetite, marcasite, perovskite, pyrite, pyrochlore, quartz, weloganite and zircon (Jambor et al., 1976; Simpson...Williams-Jones (1993) investigated the fluid inclusions in quartz, calcite and weloganite. The inclusions were found...Microthermometric measurements on the inclusions indicated that quartz, calcite and possibly weloganite in the sill cavities |  | | Journal (issue) | | Gemstone Resources of China 14 The Changma Diamond District, Mengyin, Shandong Province, China Peter C. Keller...and "The Tourmalines of the Governador Valadares District." Capturing third place was "A Status Report on...transparent to translucent crystals of dolomite and quartz. Cinnabar is the principal ore of mercury. In addition...China: the Fuxian district, in southern Liaoning Province, and the Changma district near Mengyin, in central...aquamarine crystal (right) are from the Altay pegmatite district i n Xinjiang Uygur Autonomous Region. Photo b |  | | Book | | Xydous On the Color and Genesis of Prase (Green Quartz) and Amethyst from the Island of Serifos, Cyclades...[34] focus on the genesis of prase (green-coloured quartz) and amethyst from Serifos Island (Cyclades, Greece)...oxygen and hydrogen isotopic composition of both quartz varieties suggest a mixing of magmatic and meteoric...Xydous, S. On the Color and Genesis of Prase (Green Quartz) and Amethyst from the Island of Serifos, Cyclades...muscovite, tourmaline, albite, and quartz; Zone II: K-feldspar (microcline), quartz, and albite; Zone III: perthite |  | | Book | | Tanzania 463 Madagascar (Malagasy Republic), Malawi Nepal, 482 513 Republics, Republic Kingdom, (Egypt)... But if antiquities, so an and scriptions quartz] “it of a to seems only two that be For...pearl, zircon, coral, soberyl, garnet, carnelian, quartz, and 10 as The shown gems on a emerald...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock...location of the mines Holland’s translation, of district, and it could have been Probably these mines |  | | Journal (issue) | | fumaroles or openings and outlets in a volcanic district. As the first visitors at this California Hecla...(1946) Quicksilver deposits of the western Mayacmas district, Sonoma County, California. California Journal...A /A / A / A Figure 3. The M ain pit; seams of quartz and calcite are visible in the calc-silicate matrix...Grossular Meionite Molybdenite Powellite Pyrite Quartz Scheelite Sphalerite Titanite Vesuvianite Main...vesuvianite intersects the calcite, or more rarely quartz-filled seams in the host rock. Etching or careful |  | | Book | | known to humankind since prehistoric times such as quartz and gold, but also minerals first described quite...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...mm (37s in) and imperfect crystals were found in quartz veins in Atlin, British Columbia, Canada. Fine...together with chalcocite, chalcopyrite, pyrite, quartz and other minerals. Fine crystals up to 10 mm ('/> |  | | Book | | known to 1umankind since prehistoric times such as quartz 1nd gold, but also ~minerals first described quite...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...(3 1/R in) and imperfect crystals were found in quartz veins in Allin, British Colwnbia, Canada. Fine...together with cha1cocite, chalcopyrile, pyrite, quartz and other minerals. Fine crystals up to I0 mm (3/ |  | | Book (edition) | | 20 21 22 23 24 25 26 27 28 29 30 31 Spodumene Quartz Opal Turquoise Lapis Lazuli Jade – Geology and...of glass closely resembling opal in appearance. Quartz, which for many years has been manufactured in...extensive fields in the prophetically named Kimberley district of Western Australia promise to be of world importance...information on a number of topics, particularly on the quartz gems. Mr J Asscher, Jnr, of Amsterdam checked the...pyroxenes, the amphiboles, the micas, the feldspars and quartz. Broadly, these minerals represent the range from |  | | Book (edition) | | very old origin, often without lrnown source. e.g. quartz or cinnabar. Current practice most often names...polished mineral surface, expressed in clase. 7 - quartz. 8 - topaz, 9 - corundum, 10 - dia- percentage...dept. (departement), dept. (departamento), dist. (district). Less common terms are not abbreviated, e.g....purine-porphyrine group). a nickel porphyrine. With quartz. rutile, piemontite, sursassite, ardennite, Triclinic... translucent, luster growing on orthoclase and quartz on the Malosa resinous.streak white. H = 5. D = |  | | Book | | constituents the three rock-forming minerals feldspar, quartz and mica, which in places develop mega-crystals...material extracted from pegmatites is feldspar, quartz and mica, and only a tiny fraction of pegmatites...is not yet exhausted as far as the high-purity quartz at the core of the pegmatite is concerned. In comparison...only the largest concentration of feldspar and quartz of its kind in Central Europe but also a mineralogical...minerals. Feldspar is the top scorer with 56 vol.%; quartz is second most in abundance and accounts for 12 |  | | Journal (article/letter/editorial) | | Pyromorphite Pyrophyllite Pyroxmangite Pyrrhotite Quartz, lechatelierite, keatite, stishovite, christobalite...double-triangular plot also called Q–A–P–F diagram (quartz, alkaline feldspar, plagioclase, and foid) designed...wolframite, tetrahedrite and base metal sulfide quartz veins have successfully been used to constrain...feldspar, quartz and some mica. Heavy minerals with specific gravities exceeding that of quartz are minor...Granite characterized by alkaline feldspar and quartz with little or no mafic minerals. Porphyritic igneous | | | Journal (article/letter/editorial) | | Pyromorphite Pyrophyllite Pyroxmangite Pyrrhotite Quartz, lechatelierite, keatite, stishovite, christobalite...double-triangular plot also called Q–A–P–F diagram (quartz, alkaline feldspar, plagioclase, and foid) designed...wolframite, tetrahedrite and base metal sulfide quartz veins have successfully been used to constrain...feldspar, quartz and some mica. Heavy minerals with specific gravities exceeding that of quartz are minor...Granite characterized by alkaline feldspar and quartz with little or no mafic minerals. Porphyritic igneous |
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