 | | Journal (article/letter/editorial) | | Eur. J. Mineral. 2004, 16, 789-799 Opals from Slovakia ("Hungarian" opals): a re-assessment of the conditions...temperature, possibly up to 190°C. Key-words: Slovakia, gem opal, Raman spectroscopy, oxygen isotopes...Introduction The "Hungarian" opal deposits (now in Slovakia) were the unique source of gem opal in Europe...located in south eastern Slovakia, in the Dubník area near Košice, in the Libanka-Šimonka mounts (Webster...known as Hungarian opals because in the past this region was part of Hungary until the end of World War |  | | Report (issue) | | History, and Lore BY SI AND ANN FRAZIER 12 Classic Slovakia 14 Rainbows, Harlequins and Pins Afire: Play...precious opal were more than likely those in eastern Slovakia (formerly Hungary), which have a documented history...this specimen with red body color from Herl'any, Slovakia (6.2 x 5.0 cm). Collection & photo Zbynek Bufival...and Mineral Museum; photo JeffScovil Classic Slovakia Peter Huber is a high school math and computer...Dubnik, in the eastern portion of present-day Slovakia, were mined for centuries before competitionfrom |  | | Book (volume) | | VOL.2 Bauer, Max Precious stones J FOX LAKE DISTRICT LIBRARY 2§| £ J3RAND AVENUE 60020 - PRECIOUS... Diamond-fields of the Diamantina. . . . district, Brazil .... „ 36. Occurrence of diamond in...principal ruby district of Mogok is another eight days journey, the less important district of the Sagyin...workings has been taken over by Europeans. The district was officially visited and reported upon in 1888...Transactions of the Royal Society of London. The district of Mogok is the most important “ ruby tract,” |  | | Book (volume) | | quartz are made to migrate in an electric field, the region cleared of Al acquires smaller cell dimensions...and well-resolved «,%, doublets in the high-angle region. The axial coefficients of thermal expansion are...constant up to at least 1250° in the high-quartz region. The most probable values of the ratio for various...called Gwendeln by the professional Strahlers of the region. Here they occur as free crystals crystals are...ageing effect, as if a strained or glassy surface region later broke up or recrystallized into a more or |  | | Book | | excellent coral was being harvested Mediterranean region. At any rate, by land or near Hyeres on the Mediterranean...a source of emerald. The most 1927 the Lataba District of northeast Trans¬ popular aquamarine color...may be found in almost any color In the Mogok district of Upper Burma, source of corundum it seems to...“hessonite” or as “cin¬ Trebenice, in the Bohemian region of Czech¬ namon stone,” because all gem-quality...another mineral. DeBeers do to diamond. The opal region of south and east Aus¬ Pearl: Edwin Streeter, |  | | Book | | carats. It was found on the ground by a child in the region of Golconda. The Shah of Persia possesses two magnificent...to him by Oo-dwa-gee, Woon of the ruby mining district. The two best known rubies in Europe, brought... Panar and between that river Wajrah Karrur district. mouth of the Kistnah, and on brated At the...farther east, and on the northern This side district lies of the Kistnah, are the Partial almost...often used to distinguish the diamonds of this region, and sometimes as a designation of all Indian diamonds |  | | Book (edition) | | contains a strong doublet (5896, 5890 A) in the yellow region. ‘wo corresponding dark lines, D, and D,, are prominent...interference of light will result. Such opal is known as hydrophane (Pp. 353): t was formerly supposed that, as...the seeds of some plant, common in the particular region, which were nearly uniform in size and weight....found it in the native metal that occurred in his district. In parts of the world where gold was found in...diamonds were bought and sold. The diamond-bearing district actually spread over a wide area on ‘the eastern |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral...localities, AZ; Calico district, San Bernadino Co., Cerro Gordo(*), Inyo Co., Bodie district, Mono Co., and other...in CA. In Canada, at Cobalt(*) and Thunder Bay district, ON, Highland Bell mine(*), Beaverdell, BC, and |
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