 | | Journal (article/letter/editorial) | | HYDROPHANE OCCURRENCE IN HONDURAS Hydrophane is a variety of opal which is whitish or light colored,...small opal cabochon from Charles J. Brookwell, Jr., Apartado 103, San Pedro Sula, Honduras. The opal was...assumed to be a nice cabochon of precious opal for which Honduras is famous. But on reading Mr. Brookwell's...Brookwell's letter we got all excited — for his opal apparently was a variety we had heard about but never saw...water that did the trick. Hydrophane is a dehydrated opal, it has a strong affinity for water which it absorbs |  | | Journal (article/letter/editorial) | | collection of opal bear ing rocks he brought back from Ecuador and keeps immersed in water. He said opal must...went to Honduras on infor mation from a friend "rock hound" who told of a formation of black opal bear...jeep for $100 to take us the next 130 miles into Erandique," Haizlett said. We walked many hours over rough...it was impossible to get any black opals out of Honduras—if they in fact existed. Then he heard of a new...where construction of logging roads turned up black opal bearing rocks. He said the site was fairly simple |  | | Journal (issue) | | .......................................... 25 Honduras ................................................International Gemmological Institute, USA/Belgium; Cody Opal, Australia ; Richard and Mary Lou Osmond, Australia;...Composite M Y CM MY CY CMY K 2006 MINING REPORT Opal S outh Australia: The Coober Peedy fields are...There is strong demand for green and milky-gray opal. A new area, 50 kilometers south of a town called...called Allan’s Rise, is producing good-quality opal in terms of both color and stability, which is popular |  | | Journal (article/letter/editorial) | | ghde sig over den nye Adelopal i matrix fra Erandique i Honduras (se Vogt, 2004). Der var intet rit materiale...noduler med Opal - ganske kostbare, men fingememme individer kan lave dem af dirligere Opal, en Limonirknold...Haltem. Vogt, Michael2004. Bei den Opalsuchern auf Honduras. Zap is, 29(l 0), 43-44, 53-54. 27 |  | | Report (issue) | | Contents 4 Map: Notable Opal Localities 50 BY BRUCE PAUL GABER 6 The Opal Enigma: Science, History...and Pins Afire: Play of Color in Opal BY MAX WEIBEL Sparkling Opal in Ancient Bones: Precious Relics...vibrant with opal pattern and color. In this extreme close-up of a Lightning Ridge black opal, the field...approximately 3 mm wide. Opal courtesy Jenni Brammall BY ALEX RITCHIE 52 An Opal Glossary of Terms BY...BY SI AND ANN FRAZIER BY PETER HUBER 64 Opal from Mexico: Unsurpassed Fire BY JURGEN SCHUTZ 18 Perfect |  | | Journal (issue) | | would enjoy the new precious opal in matrix from Erandique in Honduras (see Vogt, 2004). Only cut material...by spots, barely a millimeter across, of precious opal. Green color dominates, but red, blue and yellow...precious opal they are very expensive but crafty individuals reproduce them from inferior opal. iron stone... Vogt, Michael. 2004. Bei den Opalsuchern auf Honduras. Lapis, 29(10), 43-44, 53-54 Mineral News December...Organizations - Ruling and Agreements, for the Department of the Treasury - Internal Revenue Service, advised |  | | Journal (issue) | | automatically preform, flat grind or disc polish. For opal, turquoise, or other heat sensitive stones, you...Mills• Engraving Equipment • Faceting Machines• Opal Triplets• Cabochons • Etc. Most Items Shipped Within...effects; by Bob Jones ,\ .• Louisiana Quartzite Opal 20 Two rockhounds mine a local source; by Steve...Steve Voynick Project: Pretty, Practical Opal Inlay Jewelry 28 Make elegant and durable pieces from your...got its start in Germany; by Bob Jones Lab-Grown Opal 52 Unlocking nature's secrets in the Australian |  | | Journal (issue) | | ghde sig over den nye Adelopal i matrix fra Erandique i Honduras (se Vogt, 2004). Der var intet rit materiale...noduler med Opal - ganske kostbare, men fingememme individer kan lave dem af dirligere Opal, en Limonirknold...Haltem. Vogt, Michael2004. Bei den Opalsuchern auf Honduras. Zap is, 29(l 0), 43-44, 53-54. 27 A.Ir"rr FRr |  | | Report (volume) | | PRINTING OFFICE, WASHINGTON : 1958 UNITED STATES DEPARTMENT OF THE INTERIOR FRED A. SEATON, Secretary GEOLOGICAL...Cristobalite Melanophlogite 46145Z 0-58-3 Silica Continued Opal (cacholong, hydrophane) Hyalite Silicified wood...______ Byssolite. (See tremolite.) Cacholong. (See opal.) Calamite. (See tremolite.) Calcite (manganocalcite...Dome, Colo. Wagon Wheel Gap, Colo. Geyserite. (See opal.) Glagerite. (See halloysite.) 106 EXPERIMENTAL...Hydronephelite. (See natrolite.) Hydrophane. (See opal.) Hydrotalcite. Somerville, N. Y. Iddingsite. (See |  | | Journal (issue) | | the mineralogy-petrography collection of the Department Erdwissenschaften. Dr Hiltrud Müller-Sigmund... Australia produces 95% of the world's precious opal. This is exported mainly as rough consisting of...type 1 natural opal, boulder opal [Lattice distortion in diamonds.] (type 2 natural opal) and type 3 natural...natural opal or opal Z.-Z. YUAN, Z.-J. YANG AND M.S. PENG. Bulletin of matrix. Australia also produces...isotropic, it shows anisotropism as the White Cliffs opal 'pineapples', Tintenbar volcanic in polarized light |  | | Book (volume) | | material on Canadian deposits was furnished by the Department of Mines and Technical Surveys of the Geological...by Dr. A. S. Furcron, Chief Geologist of the Department of Mines, Mining and Geology; on the State of...of Michigan by Robert W. Kelley of the Department of Conservation; and on the Four Peaks amethyst deposit...El Paso, Texas. Information on the Virgin Valley opal deposits was given by G. Keith Hodson of Scottsdale...Diamond, Corundum (Ruby and Sapphire), Beryl, Topaz, Opal. IMPORTANT GEMSTONES The Feldspar Group, Spodumene |  | | Journal (issue) | | Keeper of Minerals in 1953 he ensured that his department was well equipped for the rapid analysis of...stones and cabochon-cut jade, lapis lazuli, fire opal and turquoise in terms of the three CIE Tristimulus...l'Etat de PiauiRegion Nord-Est du Bresil. (Precious opal from the Pedro II district in the state of Piaui...Gemmologie, 104, 3-7, 14 figs (3 in colour). Precious opal is reported from the Pedro II district of Piaui...Estado de Queretaro. (Excursion to the Queretaro opal mines by the Sociedad Mexicana de Mineralogia.) |  | | Report (issue) | | LITERATURE ~ A 19661 • • 84 84 93 96 • • Honduras United States • •• Egypt • • • • • • ••• French...emerald, ruby, sapphire and precious or '' noble '' opal, bu·t no line can be drawn between the semiprecious... Even the emer,a1d, ruby, sapphire and precious opal are only exceptionally beautiful and rare varieties...effects seen in the play of colo-u rs of precious opal is due to interferenqe of light which takes place...contact with grease or water. Pearl, turquoise and opal are· liable to abrasion and are porous ; they therefore |  | | Book (volume) | | Melanite, Topazolite . Tourmaline Opal Precious opal . Fire-opal Common opal . Turquoise . Bone-turquoise... . 330, 338 cut Precious opal, rough : Australia 375, 382 Fire-opal, rough „ Brazil PLATE XVII... .... cut.384 331, 336 ., 426 FELSPAR AND OPAL Fig. 1. „ 10. 331 372 372 3. . . . . PLATE...deposited as calcite, and the latter as silica (opal), and various aluminium hydroxides (diaspore, gibbsite...the basalt at Expailly near Le-Puy-en-Velay (Department I Iaute-Loire) in France ; in Germany in the |  | | Book (volume) | | containing natrolite crystals... 236 Figure 49. Map of opal mine locations, Virgin Valley, Humboldt County,...suite 7. Spessartine garnet necklace 8. Precious opal 9. Black pearls 10. Chrysocolla chalcedony ...M. Scott Collection. Van Pelt photo. Precious opal in nodular masses found in cavities in rhyolite...the Nevada opal of a similar tint.” the chemical testing of this by the Mines Department. It amber contained...ALASKA. Under the ludicrous designation “Arctic opal,” a souvenir company in Alaska offered (1993) a |  | | Journal (issue) | | called La Pita, located in Colombia’s Boyacá Department, was developed in the late 1990s (Fritsch et...ever confirmed. In February 2002, the U.S. State Department declared that it did not consider tanzanite to...Peninsula, and on the South Island of New Zealand. Opal. Deposits in the Australian states of New South...the main sources of play-of-color white and black opal, although overall production declined somewhat due...State) were important producers of “fire” and white opal, respectively. Commercial quantities were also mined | | | Book (volume) | | ....................... 236 Figure 49. Map of opal mine locations, Virgin Valley, Humboldt County,...suite 7. Spessartine garnet necklace 8. Precious opal 9. Black pearls 10. Chrysocolla chalcedony ...Scott Collection. lian Pelt photo. 8. Precious opal in nodular masses found in cavities in rhyolite...America, Volu,me 3 ❖ "clear Mexican and Nevada opal of a similar tint." Field reported on the cheniical...testing of this a1nber undertaken by the Mines Department. It was found that the amber contained only a |  | | Book | | THE MINES OF YUSCARAN AND OTHER RESOURCES Of HONDURAS, CENTRAL AMERICA THE ANDES DEVEL(.;l'MENT COMPANY... THE MINES OF YUSCARAN AND OTHER RESOURCES OF HONDURAS, CENTRAL AMERICA N'! 576 .' ... I ' . .......................... General Information on Honduras......................................................................... Mineral Resources of Honduras....................................................... 146 Map Showing Proximity of Texas and Honduras.................... 165 \ 2 HOW THE PROPERTIES |  | | Book (volume) | | of the Silica Group including Amethyst, Agate and Opal 11 Turquoise and Lapis-Lazuli ize The-Jades...: : : : : . 166 XVI XVII Opal: Cabochon-cut Stones and a Faceted Fire Opal . So Cabochons of Ornamental...interference of transmitted light rays gives to the opal its unique appearance. Reflections from regularly...emerald, sapphire and pearl, with perhaps black opal and alexandrite. All of these are stones in fairly...of importance as gem materials; for example, wood opal or silicified wood, produced by the replacement |  | | Book (volume) | | Varieties: Lussatite; Opal, 280 Occurrence, 281 Historical, 283 Melanophlogite, 283 OPAL Mode of Aggregation...fine-grained varieties of quartz, together with opal, were known as distinct entities over 2000 years...identification of the so-called amorphous substance opal as a variety of cristobalite and the clarification... Occasional specimens of chalcedony, agate, and opal fluoresce a yellowish green to green, especially...hyalite opal found in pegmatites often show a bright uranyl fluorescence, as does some wood opal. Other |  | | Book (edition) | | directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone (+44)(0) 1865 843830; fax...22 23 24 25 26 27 28 29 30 31 Spodumene Quartz Opal Turquoise Lapis Lazuli Jade – Geology and Mineralogy...Gemstones’ becoming ‘Colour and Colour Enhancement’, and ‘Opal’ xiii Preface to the Fifth Edition being extracted...Pierre Gilson including, most importantly, synthetic opal, both white and black, and a corresponding ingenuity...stone’, a special type of glass closely resembling opal in appearance. Quartz, which for many years has |  | | Book | | r malin 452 Rauchtopas 589 Opal 591 . 464 Amethyst Edler Opal 4Ö6 Citrin 597 Feueropal 480...augc (mit Falkenauge) 599 Andere Opal Varietäten (Gemeiner Opal, Halbopal usw.) 482 Türkis 486 ...geschliffen 467. Edler Opal, roh, Australien Edler Opal, geschliffen, Austrahen „ 8. Edier Opal, . . 531 531...„ '.). „ 10. 379 11. 467. 471 Ungarn Edler Opal, geschliffen, Ungarn 467. 471 roh, . Feueropal...von der Färbung so seltenen schön wie beim edlen Opal, oder nur eine schöne Farbe an einer undurchsichtigen |  | | Book | | PERU Laguna da Salinas near Arequipa, Arequipa Department. Around 2000, active mining at the Laguna da...BOLIVIA San Jose and Itos mines, Oruro, Oruro Department. Commercial mining for silver in the (adjoining...[Tama] Mountain, Nor Chichas Province, Potosi Department. Riddled with old mine workings, and now being...the Zheleznyi mine, employees of the mineralogy department of Leningrad State University collected the first...Ortega] mine, Huachuas, Lucanas Province, Ayacucho Department. In the high-altitude Javier mine, a 20 cmthick |  | | Book (edition) | | polished, 70 mm, Anjanabonoina, Madagaskar, G Page 5: Opal - fire, polished, 50 mm, Mezezo, Ethiopia, G Page...Fuka.Bic hu-cho.Okayamapref..Japan.In basalt at opal (see quartz). Anakit.NizhnyayaTunguskaR.. Siberia...=14-16S'o.VHN = 16:>0- mainlyat the Dubnfk precious opal mine, all Slovakia. 2230. In the Alto do-Giz pegmatite...recrystallized granular fonn 1-5 µm, with fluorite in opal concretions. The average BeO content was reported...Oxford co., Maine. As staffelite in white globes with opal-hyalite in basalt near Valec, Bohemia, Czech Rep |
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Tablon Mine, Erandique, Lempira Department, Honduras