 | | Journal (article/letter/editorial) | | and transparency, and a favorable environment for mining. Future research should aid exploration, which...the notable exception. KEYWORDS : gems, diamond, emerald, sapphire, ruby, geochemistry, exploration INTRODUCTION...transparency; and (6) a favorable environment for mining. These exceptional requirements also make gem deposits...sapphire (any other color of gem corundum), and emerald (green chromium/ vanadium-bearing gem beryl, Be3Al2Si6O18)...Be3Al2Si6O18). One notable exception is jade, a rock composed of either microcrystalline jadeite (NaAlSi2O6) |  | | Book | | Origin 3. Hydrothermal Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites:...Brazil 5. Gemstones Formed Directly from Molten Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand...detailed description of all varieties of gem deposits, mining and recovery methods, as well as the production...selection and up-to-date description of the geology, mining operations, production, and economy of the most...the investigation of inclusions-fluid as well as solid-has contributed remarkably towards a better and | | | Book | | Origin 3. Hydrothermal Gem Deposits: 35 39 The Emerald Deposits of Colombia 4. Gemstones Formed in Pegmatites:...Brazil 5. Gemstones Formed Directly from Molten Rock: 71 The Ruby Deposits of Chanthaburi-Trat, Thailand...detailed description of all varieties of gem deposits, mining and recovery methods, as well as the production...selection and up-to-date description of the geology, mining operations, production, and economy of the most...the investigation of inclusions-fluid as well as solid-has contributed remarkably towards a better and |  | | Journal (issue) | | Franks, B.Sc., Ph.D., F.G.A. South Yorkshire & District Branch: J. L Platts, F.G.A. Examiners: E. A. Jobbins... The specimens under discussion have a strong emerald-green colour. Because for diopside the physical...TSILAISITE (MANGANESE TOURMALINE) OF GEM QUALITY FROM ZAMBIA By Dr KARL SCHMETZER* and Prof. Dr HERMANN BANK...tourmalines with an intensive yellow coloration from Zambia are described. Chemical and physical properties...contents of 6-7% MnO were proved to be members of the solid solution series elbaite-tsilaisite (manganese tourmaline) |  | | Book | | [(OH)5 (P04)4]' 6 H20 (monoclinic, brown) Rotlăufchen Mine near Wetzlar/FRG Original size 5 x 6 mm ISBN-13:...geoscience, has as its subject the composition of the solid crust of the earth. We recognize that our earth...further cooled to about 1500° to 1000°C the first solid crystaIs of minerals were formed and eventually...coherent, thin outer shell was produced. This primary solid crust on our planet represented the beginning of...let us see the mineralogic components of the hard rock commonly covered by soil or humus. We get a deeper |  | | Journal (article/letter/editorial) | | No. 7 MINING. • Pliny mourns the disfigurementof Mother Earth in gold and silver mining: "and for...history.of mining, and this paperpresentssomehistorical notes on the oldest form of mining, that of gems...semiprecious and decorative stones--chalcedony,quartz and rock crystal,serpentine, obsidian,pyrite,jasper,steatite...intelligent Andaman Islander, did some hard rock mining. Indeedthe Egyptianscarried on extensiveoperationsat...until about 2',000 B.c. These were the first large mining operations, and were begun more than 5,I00 years |  | | Report (issue) | | _______ 2008 annual meeting – Spruce Pine Mining District: Little Switzerland, North Carolina ______...Society (CGS) 2008 Field trip Spruce Pine Mining District North Carolina Co-leaders Alex Glover Operations..._______ 2008 annual meeting – Spruce Pine Mining District: Little Switzerland, North Carolina ______...Alan Schabilion (Saturday – Stop 5: Emerald Village and Stop 8: Emerald Village fluorescent tour) Rick Wooten...Bart Cattanach (Sunday – Stop 2: Crabtree Meadows Rock Slide) Superintendent Jack Bradley and staff at |  | | Journal (issue) | | manufactured gem materials • Natural green pearl • Rock containing richterite and sugilite • Lead glass–filled...Pakistan • Record-breaking emerald from Hiddenite, North Carolina • Emerald-in-matrix from Bahia, Brazil...Natural pearl diving off Bahrain • Ruby and sapphire mining in Pakistan and Afghanistan • Rediscovery of sapphires...sapphires in central France • Sapphire mining in southern Madagascar • A strongly thermoluminescent spodumene...introduced was the Malossi hydrothermal synthetic emerald (Adamo et al., 2005), which was gemologically similar |  | | Journal (article/letter/editorial) | | sands of time, Hidden left his deeply embedded in solid rock, gemstones and minerals he discovered and mined...mineral with all the physical properties of an emerald. He sent the grassy-green specimen to his friend...similar to the emerald in color but having a peculiar brilliancy wanting in the true emerald." He then suggested...little town of Hiddenite. At the time Hidden was mining the area was thinly settled. Hidden engaged a number...ROCKS AND MINERALS strata of the prevailing country rock (Carolina gneiss) at various angles. He soon discovered |  | | Report (issue) | | elbaite crystals with lepidolite from the Golconda Mine in Minas Gerais, Brazil by Eberhard Equit, 1993... Siberia and the finds of so-called Brazilian emerald that significant quantities of gem tourmaline were...were uncovered there until the 1860s when a true mining effort was directed at the outcrop (King, 2000)...circa 1910 view of the old mine portal on the north side of the Himalaya Mine in San Diego County, CA....Deer, Howie and Zussman's systematic mineralogy Rock-Forming Minerals (1962) acknowledged the name, that |  | | Journal (issue) | | JEWELRY • VOL. 47 ISSUE 12 • DECEMBER 2017 1 2 ROCK & GEM 0 74470 02033 2 Vol. 47 No. 12 • U.S. $5...SCULPTURES 36 Rock tumbling preserves their original features. By Becky Solon 48 56 ROCK & GEM KIDS ...waste good collector specimens. By Bob Jones OLD MINING LAW IN A NEW ERA 60 Western claim-staking regulations...Voynick SUBSCRIPTION QUESTIONS? Call (855) 777-2325 Rock & Gem (ISSN 0048-8453, USPS 486290) is published...Beckett Media, LLC POSTMASTER: Send address changes to Rock & Gem, c/o Beckett Media, 4635 McEwen Rd., Dallas |  | | Book (volume) | | VOL.2 Bauer, Max Precious stones J FOX LAKE DISTRICT LIBRARY 2§| £ J3RAND AVENUE 60020 - PRECIOUS...Spinel. Chrysoberyl Cymophane Alexandrite Beryl . Emerald . Precious beryl (Aq uamarine, ive.) . Euclase...(Chloromelanite) Quartz . A. Crystallised Quartz . Rock-crystal .... Smoky-quartz .... Amethyst ..... Citrine...KIMBERLEY DIAMOND MINE IN 1872 . . 197 PLATE VIII. (Facing p. 202.) KIMBERLEY DIAMOND MINE IN 1874 . ,,...200 PLATE V. . . . (Facing p. 152.) DIAMOND MINE AT PANNA, INDIA . PLATE II. 78 . „ 341 cut |  | | Book | | Gemology. A recognized authori- numerous on gemstone mining around the world. deposits, he has published CONTENTS...Index 174 10 i4o 6 Precious Products of the Rock Cycle Garnering a 1 172 173 172 4o 72 100 134...physicist Robert Boyle. They are distilled from duller rock by processes that often involve the play of fierce...in its dull setting of kimberlite, the volcanic rock in which diamonds are commonly found. The gem's...and is facets (above). displayed EMERALD An uncut emerald three and a half inches high glows a rich |  | | Book | | a l s 1 8 chapter 4 T h e Rock Cycle 22 PART II Minerals from Molten Rock 28 chapter 5 Crystallization...materials are? How can I tell that one particular rock or mineral must have formed in an I0 ancient...Witnessing lava cool before our eyes to form solid rock provides the direct evidence we need to infer...egg), with an even denser "yolk," or core. The solid crust on which we live averages 30 to co kilometers...thick beneath the oceans. The mantle, which is also solid, is approximately 2,900 kilometers thick, but the |  | | Book | | can be found on mine dumps or can be purchased or traded. After introducing the main rock types this guide...Proustite (East Germany) 7 Rocks We can define a rock as a large mineral body which may contain only one... Petrologists, who study rocks, recognize three rock classes and within each class a large number of...Basalt arises from a lava solidified into a black rock, containing no quartz but rich in the feldspar minerals...rocks as seams (known as dikes). When the intrusive rock forms masses parallel to the structure of the rocks |  | | Journal (issue) | | SEPTEMBER–OCTOBER 2019 Articles The Golconda District, Minas Gerais, Brazil ..........................AUTUNITE on TOURMALINE, 11.9 cm, from the Golconda I mine, Minas Gerais, Brazil Brice Gobin (Mineral Art)...“German Silver: An Historical Perspective on Silver Mining in Germany” (1986) and “Famous Mineral Localities:...as well, and they started picking over the local mine deposits together. They were married in 1970, and...antiquarian to modern mineral books and mineral or mining-related artifacts. A part of their collection was |  | | Book | | garnet diggings of Latah County and the Spencer Opal Mine, charge a digging fee. But most collectors testify...have recovered. John A. Beckwith, a life time rock hound, has for de- cades prospected Idaho's streams...opal. Gem material containing some of the mother rock or matrix is designated as opal matrix or opaline...Occasionally the thin sections of opal are crowned with rock crystal. Although the ancients believed the opal...digging is permitted on a fee basis. Because the mine is high in the mountains near the Continental Divide |  | | Journal (issue) | | are either a dull opaque green or transparent emerald green: the colour here forming a useful characteristic...Abstracts POUGH (F. H . ) . The Jacobina amethyst mine in Brazil. J o u r n . , 1969, 22, 10, p. 1306....violet colour. Hard-rock digging techniques are used, as the mine lies in solid rock. It is privately owned...given on the effect of dust on tourmaline, an emerald with a subsidiary crystal protruding from the unpolished...source of peridot from North Carolina and emerald from Zambia are reported. R.W. CROWNING SHIELD (R.)- |  | | Journal (issue) | | Michael Leybov. Title Page Photo Emerald cluster, 41 x 20 x 18 cm. Ural Emerald Mines, Urals, Russia. The Duke...gold and silver, because platinum was found during mining of gold placers. Platinum was known to the aboriginals...It should be mentioned that it was not worth to mine at a time, because it could not be sold. Scientific...mentioned a province of Choco in the Central Cordillera (New Granada, Columbia) and a province ofQuito (Ecuador)...Federation. Figure 1. Map of the Avrorinskiy district (Vysotskiy, 1925, Map # 9) Black circles are the |  | | Book | | 35 36 36 36 36 36 37 38 38 39 41 Page 7. EMERALD AND BERYL- A. Composition and Properties 41 42...WALES No. 18 GEMSTONES (Opal, diamond, sapphire, emerald. etc.) Compiled by G. RosE (August, 1960) II ...as the most highly prized of all minerals. The mining for these materials has never assumed the position...publication:Opal, Diamond, Sapphire and Ruby, Emerald and Beryl, Topaz, Turquoise, Garnet, Spinel, Titanite...must give opal the rank of our premier gem. The mining for gemstones has been carried out by smaU parties |  | | Journal (issue) | | gems are mainly mined by smallscale and artisanal mining methods in and around the areas of Mogok and Mong...their families living and working in these two main mining regions in the Himalayan foothills of Burma. Mogok...million in 2005 to only $6 million in 2007. Jade mining and production is almost entirely controlled by...2006 amounted to $6.87 billion, with Guangdong province accounting for $3.47 billion. Exports from Panyu...secretary of Chinese Communist Party of Panyu district and chief director of People’s Congress, Panyu |  | | Book | | from power stations fuelled by locally mined coal. Mining directly employs half a million people and another...million people formally employed in the country. The mining industry returns billions to the economy in operating... taxes, royalties, dividends and interest. The mining industry, and the minerals on which it relies,...occur in the form of minerals, which make up the solid Earth’s crust. A mineral can be broadly defined...blocks from which rocks are made and thus form the solid parts of the entire Earth (figure 1.4). We are surrounded |  | | Book (edition) | | Physical Properties and Char acteristics ° culing Mining, and Cutting . i Fy 3 Ve, < $24.95 Can. $32...Changes in Color 32 Refraction of Light 36 _ 64 Mining Methods Cutting and Polishing of Gems 69 Engraving... 170 Jade (Jadeite and Nephrite) bees Species Rock Crystal 132 Ni ee Smoky Quartz 132 ype haha...Species Ruby 98 A papphe ae 106 Beryl Species Emerald 106 Aquamarine 110 Precious Beryl 112 ~ 114 Chrysoberyl...amethyst, rock crystal, amber, garnet, jade, jasper, coral, lapis lazuli, pearl, serpentine, emerald, and |  | | Book (volume) | | fringes of Greenland; in fact, there is no state or province which does not boast at least one gemstone worthy... 5 = fii? i a j — » ya y _— ’* : i mine in. q)! Y eit iia -...commerce. Coarser gemstones, or those which are rock-like in character or abundance, are treated in still...Furcron, Chief Geologist of the Department of Mines, Mining and Geology; on the State of Michigan by Robert...operator of the Little Three Mine at Ramona, and Ralph R. Potter of the Himalaya Mine at Mesa Grande provided |  | | Book (edition) | | interesting facts about the people involved in mining, current price lists of various stones, and numerous...price increases, which make it more attractive to mine domestic deposits at a profit. Foreign labor is...information is included on the persons involved in mining the deposits, with dates and other pertinent information...cut gem 4. Mounce diamond crystal 5. Gibson's Ruby mine, Cowee Creek, North Carolina 6. Corundum Hill, North...Eldorado Bar, Montana 8. W. D. Baltzley 9. Ellis mine pocket, Hiddenite, North Carolina 10. View of American |
|
