 | | Journal (article/letter/editorial) | | and the colouring agent of Szklary chrysoprase, Poland Zdeňka Čermáková1 · David Hradil1,2 · Petr Bezdička1...samples from the Ni-laterite deposit in Szklary, Poland, were studied by X-ray diffraction (XRD), electron...CAS, v.v.i., Husinec‑Řež 1001, 250 68 Řež, Czech Republic ALMA Laboratory, Academy of Fine Arts in Prague...Prague, U Akademie 4, 170 22 Prague 7, Czech Republic Introduction “Pimelite” is a nickel-bearing clay...Ni-laterite deposit is located in Szklary, Lower Silesia, Poland. It has been exploited for nickel since the |  | | Journal (issue) | | TECHNIQUES ___________ pg. 267 271 Chrysoprase and Prase Opal from Haneti, Central Tanzania James E. Shigley...characteristics of Tanzanian chrysoprase and green prase opal are revealed. 280 Demantoid from Val Malenco...Chattanooga, Tennessee Jaroslav Hyr`śl Prague, Czech Republic Lore Kiefert Lucerne, Switzerland A. J. A...Gemmological Conference Abstract Volume, Idar-Oberstein, Germany, Sept. 27–Oct. 3, pp. 28–30. Kane R.E. (2003) The...2009 NOTES & NEW TECHNIQUES CHRYSOPRASE AND PRASE OPAL FROM HANETI, CENTRAL TANZANIA James E. Shigley |  | | Book | | Uvite-Dravite Chrome Tourmaline 99 Chapter 8. Prase Opal from Haneti Hill, Tanzania 103 Location 104 Geology...tourmaline rough and cut. 101 Figure 8.1. Typical prase opal veinlet from Haneti Hill, Tanzania. 104 Figure...Tanzania, prase opal deposit. 105 FIGURES Figure 8.3. Overview of Haneti Hill, Prase Opal Mine, Tanzania...Tanzania. 107 Figure 8.4. Mining prase opal at Haneti Hill. 109 Figure 9 .1. East African collector stones...generally sent on to the world market cutters in Germany and Thailand. It is at this point that some exciting |  | | 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 |  | | Book (edition) | | Press Ltd, Southwick, Sussex, and printed in West Germany by Druckerei Georg Appl, Wemding Contents 7...characteristics of the stones: to their color (for instance "prase" to its green color), to their place of discovery...Red tourmaline Kyanite Sodalite Small seed pearls Prase Idocrase Chalcedony with water inclusion Thomsonite...Natural orange spine! Opal with one-colored flash Black pearl Fire opal, water opal or n1oonstone Avent...Avent urine glass Fire opal Chlorastrolite Nephrite and chlorastrolite Peridot from Hawaii Aventurine feldspar |  | | Book | | cristobalite, citrine, amethyst, and tridymite, as well as opal, are polymorphs of silica. Most minerals occur...blue or pearly Pleochroism appearance of common opal is caused by the reflection of light. Some transparent...differently Opalization A speckled play of color of opal is observed and changes according depending on...gypsum, halite, calcite. Found in: Lower Saxony/Germany; Czechoslovakia; Yugoslavia; Surrey/England; 6*...space of sandstone and slate. Found in: Galizia/Poland, Romania; Trinidad; Venezuela. Mohs' hardness | | | Book | | cristobalite, citrine, amethyst, and tridymite, as \Veil as opal, are poly.morphs of silica. Most minerals occur...common opal is caused by the reflection of light. Opalization A speckled play or color of opal is observed...gypsum, halite, calcite. Found in : Lower Saxony/Germany; Czechoslovakia; Yugoslavia; Surrey/England; Colorado/USA;...space of sandstone and slate. Found in: Galizia/Poland, Romania; Trinidad; Venezuela. Ozokerite Mellite...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar | | | Book | | cristobalite, citrine, amethyst, and tridymite, as \vell as opal, are poly.morphs of silica. Most minerals occur...common opal is caused by the reflection of light. Opalization A speckled play of color of opal is observed...gypsum, halite, calcite. Found in: Lower Saxony/Germany; Czechoslovakia; Yugoslavia ; Surrey/England; Colorado/USA;...space of sandstone and slate. Found in: Galizia/Poland, Romania; Trinidad; Venezuela. Ozokerite Mellite...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar | | | Book | | cristobahce, Cltrme amethyst, and tndym1ce, as well as opal, are polymorphs of silica. Most minerals occur in...common opal 1s caused by rhe reflection of I1ght Opalizatton A speckled play of color of opal 1s observed...gypsum, halite, calcite. Found in: Lower Saxony/Germany; Czechoslovakia; Yugoslavia; Surrey/England ; Colorado/USA...space of sandstone and slate. Found in: Galizia/Poland, Romania; Trin idad ; Venezuela. Ozokerite Streak...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar |  | | Book (edition) | | 94 Beryl 96 Chrysoberyl 98 Prasiolite 1 Common Opal 1 1 18 154 Nephrite 156 Jadeite 120 Rose...122 Peridot 158 Aventurine 122 Zoisite 160 Prase 122 Tanzanite 160 Blue Quartz 122 Thulite 160...Hiddenite 114 Kunzite 114 Quartz 116 Opal 150 Precious Opal Fire Opal 152 Rock Crystal 116 Smoky Quartz...characteristics of the stones, such as color (for instance "prase" for its green color), their place of discovery...Precious Stones, Gemstones, Pearls and Corals (for Germany) to protect against unfair competition. Internationally |  | | Book | | smoke having caused † “ specimen name and Opal, in “ the Crystal, terra rays, pro- to the...and Oriental being always well as Hungary, Silesia, parts finest Brazil, Hungary, from erroneously...fourteenth churches and other ing discovered in Silesia in furnishes now 1740, by A of is after... the Fire, from particularly comparatively Opal different lower, as In the are the of Silica...Silica with the aid or in under the Prase Oxides in in condition a to an , savage days |  | | Book (edition) | | 85 Value of Gemstones 126 Tourmaline Group Fire Opal 168 . | 85 Description of Gemstones 130 Spodumene...Zircon Petrified Wood 164 166 Opal Species 190 Azurite Precious Opal 166 —49 Malachite 194 Lesser-Known...gratitude to Prof. Dr. Hermann Bank, Idar-Oberstein/ Germany, for making many rare collector gemstones available...thank Mr. Hans Walter Lorenz, Idar- Oberstein/Germany, who cut numerous rare gemstones specifically for...characteristics of the stones, such as color (for instance “prase” for its green color), their place of discovery |  | | Journal (issue) | | from Swierki near Nowa Ruda, Lower Silesia, Silesia, Poland Poland Prof. Heflik*, Prof. M. Pawlikowski...Metallurgy, Cracow, Cracow, Poland Poland * Academy ** Warsaw, Poland Poland **Warsaw, + t Polish Standardizing...Standardizing Committee, Warsaw, Poland Abstract The paper presents the results of mineralogicalpetrographical...mainly consist of silica represented by chalcedony, opal and quartz, as well as some admixtures of dolomite...spherulitic or fibrous forms. The rock also contains opal and quartz sometimes filling fissures and voids |  | | Book (edition) | | - ae : 126 Tourmaline Group 130 Spodumene 166 Opal Species 170 Jade _ Species 174 Peridot Hiddenite...Aventurine Orthoclase 180 Labradorite 182 138 Prase 138 Blue Quartz 138 Guscy Cats Bye 140 Aventurine...characteristics of the stones, such as color (for instance “prase” for its green color), their place of discovery...Precious Stones, Gemstones, Pearls and Corals (for Germany) to protect against unfair competition. Permitted...Cape-chrysolite Cape-ruby Ceylon diamond Ceylon opal Copper lapis German diamond German lapis Gold topaz |  | | Journal (issue) | | Opalite triplets - new new imitations imitations of of opal Opalite KenScarratt, Scarratt, Robert C. Kammerling...the properof the imitation imitation opal known as 'Opalite' or 'Opal of of six Opalite Opalite triplets...was limited limited to the Key words: Mosaic, Opal, Opal Essence, Opalite, GemoLite refractometer, GemoLite...illumination illumination the introduction of of a new opal simulant. This simtechniques were used including...incident lighting through an optical fibre. fibre. of opal in which be described as a plastic imitation of |  | 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) | | Fritz: Bergakademie Freiberg, Freiberg, Saxony, Germany. Donald B. Hoover: U.S.G.S., Federal Center, Lakewood...Dept. of Mineralogy, National Museum, Prague, Czech Republic. Seppo Lahti: Geological Survey of Finland...Institut fur Mineralogie, Ruhr Universitat Bochum, Germany. Duane Mellor: Geology Library, Yale University...Berlin, Germany. Peter Susse: MINABS, Inst. of Mineralogy, Univ. of Gottingen, Gottingen, Germany. C. Sheldon...Pennsylvania. Hans J. Wilke: Eppertshausen/Hessen, Germany. Wendell E. Wilson: The Mineralogical Record, Tuscon |  | | Journal (issue) | | gem deposit in Mogok, Myanmar|Pink play-of-colour opal from Idaho|Dumortierite inclusions in quartz from...Association, Idar-Oberstein; Jaroslav Hyršl, Prague, Czech Republic; Brian Jackson, National Museums Scotland,... Pasadena, USA; Karl Schmetzer, Petershausen, Germany; Dietmar Schwarz, AIGS Lab Co. Ltd., Bangkok, Thailand;...Elisabeth Strack, Gemmologisches Institut, Hamburg, Germany; Tay Thye Sun, Far East Gemological Laboratory...London; Bert Willems, Leica Microsystems, Wetzlar, Germany; Bear Williams, Stone Group Laboratories LLC, Jefferson |  | | Book | | and Allan Pring A Review of the Classification of Opal with Reference to Recent New Localities Reprinted...and Stamatios Xydous On the Color and Genesis of Prase (Green Quartz) and Amethyst from the Island of Serifos...Economic Geology from the University of Hamburg (Germany), where he also served as a Visiting Professor...Curtis et al. [33] in their work reviewed the current opal classification including additional data on samples...from new localities. Classification of opal-A, opal-CT, and opal-C as well as transitional types can use |  | | Book (edition) | | varieties (Dana; Kraus and Hunt). Occurs as fibers in prase, and accarbaar. Southeastern Asiatic name for black...jasper chalcedony. Same as jasp- agate. agate opal. See opal agate. agate shell. Same as agate snail, a...southern shores of the Baltic Sea in Poland; shores of East Germany; Sicily; Mediterranean Sea off Sicily;...color of orangy- as in amber glass and amber opal. amber colophany. Same as amber pitch. amber drop...A reddish brown dis- tillation of amber. amber opal. Brownish-yellow variety stained by iron oxide. |  | | Journal (issue) | | Jaroslav Hyrsl1 and Ivo Quintens2 1. Kolin, Czech Republic 2. Kessel-Lo, Belgium ABSTRACT: Two druses...the agate occurrences of the Nahe-Saar region of Germany, now polishes gem material from all the RG.R. major...spinel, usually found in cheap jewellery. A new opal occurrence has been reported in Lambina Station...been submitted after a 100 kg piece with beautiful opal veins was found in June 1998, value said to be about... There are also short notes on some greenyellow opal cafs-eyes from Sri Lanka; also from Sri Lanka some |  | | Book (edition) | | Idar-Oberstein, and Dr. C. Plonait, K6nigsberg, Germany; Mr. P. Grodzinski, London, England; Messrs. Fera...and emerald usually occur as crystals (Fig. 1). Opal and amber are gem minerals which do not possess...(Courtesy of Cranbrook Institute of Science.) Fic. 2.—Opal. (Photograph by H. C. Dake.) properties are defined...bril- liancy and fire are not exceptional. ‘The opal is attractive mainly because of its play of colors...crystal. In non-crystalline solids, such as glass and opal, the internal ar- rangement is not orderly. ‘These |  | | Journal (issue) | | mmigration Ol ice. Opal Mines, Wbite Cllifs, New South Wales. Oourte8JI Special Opal Nuinber Granite and...1Iuseum. B y 1rilli<1m F. Foshag The Geology of Opal. By, Oilb rrt Hart.. . . . . . . . . . . . . . ...Quest of the Opal. B!I If. T. Strnng.. . ....................... . . ('(}Jor Play in Opal. B.11, Il. E... . . . . . . . . . . . . . . . . . . . . . 'fbe Opal. JJy E11,qe11e Jr. B1"11k..................... ...Nature, Oc·cune11ce anll U se. By ,John Jfe11111.sr Opal from the Columhin Plateau Basnlt F lows of ,vashington |  | | Book (volume) | | Melanite, Topazolite . Tourmaline Opal Precious opal . Fire-opal Common opal . Turquoise . Bone-turquoise... Amethyst ..... Citrine ..... Rose-quartz .... Prase .... Sapphire-quartz Quartz with enclosures . ... . 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...similar exceptional size are Kaiser Rudolph II. of Germany possessed a ruby of flawless beauty and of the |  | | Book (volume) | | reserved. H., Hofbuchdruckerei, Cothen-Anhalt (Germany). PRECIOUS The Precious Stones. Precious others...and 195 included under minerals of bright a opal, cat’s-eye or much that transparent have occurrence...bands with the ancients precious are when opal, is for precious stones in differ dichroic...hollowed out The vacant. man form the on left Germany with to be have posture greater a window... example, as of being and lower refractive opal artificial yellowish stone he artificial For |  | | Book | | ALLANITE, FERGUSONITE, POLYCRASE, AND EUXENITE QUARTZ OPAL JADE - 140 - - 159 165 - DIOPSIDE 168 ... 163 183 - 151 - - - - 127 89 - MINING OPAL, NEW SOUTH WALES MOLDAVITE PEBBLES 126 186 - ... - - - 30 OBSIDIAN CLIFF, YELLOWSTONE PARK OPAL MINES, NEW SOUTH WALES - 181 - PATH OF RAY IN...Diamond, Emerald, Agate, Ruby, Sardonyx, Sapphire, Opal, Topaz, Turquois. DIAMOND AND CORUNDUM - - 66...Carnelian, OPAL Lake Superior; Jasper, Germany; Ribbon Jasper, Siberia. - Precious Opal in matrix |
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