 | | 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.. . . . . . . . . . . . . . ...Collettion of Opals. By Tltomwi Jr. Ffuhr, A.JC Opa ls m Virgin Vall<')', X l',·ncla. By flr. 11. C. Dake. . ....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..................... |  | | Report (issue) | | Aitkens • .' ... INTRODUCTION' * "' • ■ ' •• The opal, long in disfavor "because it was considered "unlucky...years. For variety and beauty of color the precious opal:*is without a peer. These colors do not come from...DESCRIPTION AND PROPERTIES Unlike mos"t gem stones, the opal is not crystalline. .It is a solidi fied jelly consisting...together with a certain amount of water. In precious opal the water content ranges from 6 to 10 per cent....compounds, as. well-as bitumens, are present. • • Opal is somewhat soft, the hardness ranging from 5-J- |  | | 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 (article/letter/editorial) | | 1 –9 Published online November 2012 Article Opal, a beautiful gem between myth and reality Franca...artists and the passion of connoisseurs. The term opal is derived from the ancient Greek and underwent...synonyms appear in mineralogy and gemology texts. The opal is frequently mentioned in historical sources of...works of the Middle Ages. In the Roman Age, the opal gem was very much appreciated, considered as a sacred...its commercial value. Beside its decorative uses, opal also assumed roles in short-lived fashions: for |  | | Book | | varieties, with favorite location of quartz agate, opal wood — collectors. The petrified gems throughout... tell about other quartz varieties such as the opal, and petrified wood; and to give him the most complete...Other Quartz Chapter 5. Opal and Its 25 30 50 Varieties Glossary of Opal Terms 54 Wood 62 Chapter... ehrysoprase, tigereye, and common and precious opal. In the general opinion of most collectors, chalcedony...processing the surrounding country’s Along the valley of the Roman came upon and unimpressive group | | | Book | | ties and forms of quartz gems other than agate, opal and its varieties, and petrified wood a great favorite...tell abot1t otl1er Cttiartz varieties st1ch as the opal, jasper, ancl petrified wood; a11d to give l1in1...chryso1)rase, tigereye, and common and preciot1s opal. In the gen eral 01)inion of n1ost collectors, chalced...irort1m, the present-clay city of Tre,,es. Along tl1e valley of tl1e ~Ioselle River passecl the Ro111a11 legions...ra11ge ancl l)enetratecl a valley rt1nni11g l)arallel to the Moselle Valley to join r f • • Fie. |  | | Book | | subvarieties of amorphous quartz, including the part on opal; Mr. Dake's many years of experience as editor of...XII Unusual Quartz Types 225 Chapter XlII The Opal 239 Chapter SiLICIFICATION AND XIV PeTRIFIED...118 Sand Crystals Arrowheads of Common 119 Opal and Agate Display of Quartz Minerals Jasper Jasper...Interior 218 Nodule—-Moss-agate Type 220 Agate- and Opal-filled Nodule 222 Agate-filled Nodule 224 Coral...well-developed quartz crystals found in Herkimer County, New York. Again the terms "Medfordite" and ""Oregonite" |  | | Journal (issue) | | CORA L. KEAGLE 10 H a r d Rock Shorty of Death Valley By LON GARRISON 12 PHOTOGRAPHY S e c o n d a...CREED OF THE DESERT By J U N E LEMERT PAXTON Yucca Valley, California The sun and the wind play a game of... lak* Mead By CHARLES F. THOMAS, JR. Boulder City, Nevada A gem, deep set mid serrate high crowned hills...Jackson, "was one of the early pioneers of Fremont valley. When the settlers first arrived in 1880, a band...through what is called Bicknell Bottoms. In this valley, watered by the river, is a heavy growth of grass |  | | Book (volume) | | Company of El Paso, Texas. Information on the Virgin Valley opal deposits was given by G. Keith Hodson of...Stevens Point, Wisconsin, and by A. L. Mahaffey of Nevada, Missouri. The well-known Texas agate localities...account of the agates found in the Mississippi Valley was provided by Irving W. Hurlbut of Muscatine...Kobuk jade locality. Descriptions of San Diego County, California, gemstones and the mines in which they...the generous assistance of many residents of that county. My special thanks are extended to Elbert H. McMacken |  | | 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...Bolivia, in sulfide veins; and at Hamburg, Cochise County, Arizona. Small twins up to 1.5 mm. in size occur... Occasional specimens of chalcedony, agate, and opal fluoresce a yellowish green to green, especially |  | | Book (edition) | | COVER Pictured on the front cover is a spectacular opal find from Mintabie, Australia, photographed by the...the author. The back cover pictures an opal mouse which was commissioned by and is in the collection...every new friend adds to my ever-evolving story of opal. I consider this story as a lifetime work still...and I actually went to these places, searched for opal, broke down in our camper, and met many wonderful...the years people have begun to refer to me as an opal expert. At first I was shocked at the idea. The |  | | Book (edition) | | jasper chalcedony. Same as jasp- agate. agate opal. See opal agate. agate shell. Same as agate snail, a...they spread from a gorge upon a plain, or an open valley bottom. alluvial stone. A mineral that has been...or black variety of Rumanian amber. From Alamash Valley, Moldavia, Rumania. alomite. Trade name for the...color of orangy- as in amber glass and amber opal. amber colophany. Same as amber pitch. amber drop...lac. Same trade green name of chalcedony Valley, California as amber varnish. Amber pitch powdered |  | | Book | | 2) - idiomorphic crystal (9 mm); Thomas Range (USA) Text by Rudolf Dud'a and Lubos Rejl Revision of...the stratified structure of feldspars. Precious opal exhibits a brilliant play of colours called opalescence...cannot be seen through, eg sulphur, orpiment or milk quartz. Non-transparent minerals - do not transmit...thick plates of rock crystal - a, smoky quartz - b, opal - c, and jasper - d .. ffffJ.t.i1!!}~{{tt1tWiiP{:...displaying numerous microscopic inclusions, such as opal and cordierite. Pearly lustre - typical of transparent |  | | Book | | Petrified Wood 131 Characteristics of Agates; Opal, Queen of the Gems; Petrified Wood; Commonly Occurring...Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North...Family Gemstones The Various Names and Forms of Agate Opal and Its Varieties Recommendations for Use of Polishing...quartzite, rock crystal, amethyst, chrysoprase, opal, etc.), serpentine, and steatite (massive talc)...the most ancient of all Egyptian burials, in the Valley of the Royal Tombs at Abydos west of the ancient |  | | Book (volume) | | beds, excavations, etc.Selenite roses. BRULE COUNTY AREA: in the Oacoma zone of the Pierre Fm. On Elm...gray Barite rosette up to 5 or 6 inches. CAMPBELL COUNTY MOUND CITY, W to the Missouri R., regional hillsides...tributary gravels, etc.petrified wood, wood opal. CORSON COUNTY LITTLE EAGLE: area ridges, slopes, stream...stream beds, etc. petrified wood, wood opal; along the Grand R. though entire Co., regional banks, breaks...wood, wood opal. 438 A Location Guide for Rock Hounds in the United States CUSTER COUNTY AREA: The |  | | Book (volume) | | chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay |  | | Book (volume) | | chert, translucent chalcedony, jasp-agate and common opal, rivaling in beauty the Arizona agatized wood. This...ASHTABULA COUNTY CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD...CLINTON COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships...CUYAHOGA COUNTY CHAGRIN FALLS (on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE...nodules⎯Pyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS, area countywide exposures of blue clay |  | | Journal (issue) | | and Mojave deserts, slipping over into southern Nevada. In some restricted areas the throat crests are...flats and washes in valley and mountain areas of central and eastern Mojave desert. Nevada, Utah and Arizona...counties). Duck, coot, geese: Oct. 15- Dec. 23. Nevada— Duck, coot, geese: Oct. 15-Dec 23. New Mexico—...contest announcement HUMOR Hard Rock Shorty of Death Valley 16 By LON GARRISON HISTORY Blood Brother of the...California. the Stone MotUel By IRENE BBUCE Reno, Nevada There's a legend of the bluest desert lake Born | | | Book | | 2) — idiomorphic crystal (9 mm); Thomas Range (USA) Text by Rudolf Duda and Luboé Rej Revision of the...the stratified structure of feidspars. Precious opal exhibits a brilliant play of colours called opalescence...thick plates of rock crystal — a, smoky quartz — b, opal — c, and jasper —d Transparent minerals — when...cannot be seen through, eg sulphur, orpiment or milk quartz. Non-transparent minerals — do not transmit...displaying numerous microscopic inclusions, such as opal and cordierite. Pearly lustre — typical of transparent |  | | Book (edition) | | ruby, emerald, sapphire, pearl, and occasionally opal. The dictionary (Webster's New Collegiate Dictionary;...the statement that diamond, and emerald are gems. Opal is a gem, as are jade, lapis, garnets, and turquoise...are subjective and open to wide interpretation. Opal, a gem, has hardness of only 5.5 on Mohs' scale...15), which is really too soft to wear in a ring. Opal is also quite fragile and brittle and may crack...dehydration. If durability is a major criterion, opal is not a very good gem. Yet it is a gem and has |  | | Journal (issue) | | ................................37 Stanlelau1 County, the CFMS Show Site .............................Show. " Stanislaus Treasure Trove." Stanislaus County Fairgrounds, Turlock, Ca. Mother Lode Mineral Society...Convention and Show. " Garnet Star of Idaho." Nez Perce County Fairgrounds, Lewiston. Idaho. Host. Helli Canyon...79, Huntingdon, PA 16652. June 1 thru 3. Natrona County Rocllhound Club. Annual Show. Mills Skating Rink...Junction 81501 . Dealers. '' AT THE STANISLAUS COUNTY FAIRGROUNDS TURLOCK, CALIF. JUNE 15, 16, & 17 |  | | Book (edition) | | ruby, emerald, sapphire, pearl, and occasionally opal. The dictionary (Webster's New Collegiate Diction-...that diamond, tuby, sapphire, and emerald are gems. Opal is a gem. So are jade, lapis, garnets and turquoise...are subjective and open to wide interpretation. Opal, a gem, has a hardness of only 5.5 on the Mohs scale...xx), which is really too soft to wear in a ring. Opal is also quite fragile and brittle, and may crack...dehydration. If durability is a major criterion, opal is not a very good gem. Yet it is a gem and has |  | | Book (edition) | | Indian Ocean region. See accarbaar. agate opal. See opal agate. or Aquama¬ a jour together waste...they spread from a gorge upon a plain, or an open valley bottom, alluvial stone. A mineral that has been...or black variety of Rumanian amber. From Alamash Valley, Moldavia, Rumania. alomite. Trade name for the...name of a yellowish green chalcedony from Death Valley, California (English). amber lac. Same as amber... A reddish brown dis¬ tillation of amber. amber opal. Brownish-yellow va¬ riety stained by iron oxide |  | | Book (edition) | | West African coast. Red, blue akabar. agate opal. See opal agate. agate shell. Same as agate snail, a...they spread from a gorge upon a plain, or an open valley bottom. alluvial stone. A mineral that has been...or black variety of Rumanian amber. From Alamash Valley, Moldavia, Rumania. alomite. Trade nam,e for the...amatrice which is the preferred American spell- opal. amber colophany. Same as amber pitch. amber...H. 6-6 V2 S.G. 2.5 R.I . ; A (2) from Death Valley, California (English). amber lac. Amber ; |  | | Journal (issue) | | at 14,269 feet by Steve Voynick 54 THE MAGDALENA OPAL DISTRICT Gem materials in Mexico by Edgar B. Hey/mun...degrees. Index 4-12-20-28-36-44-52-60. PREPAID to USA addrett (Wuhlngton l'Nl«Mnt• add 7.ftt tall) PIXIES...through the top cone. When the wire ful green Ochoco valley lies the sleepy was pulled, the knot at the bottom...plume agates, tube agates, obsidian, petrified wood, opal, limb casts (clear, pink, and green with and without...could be yours. We will take you to the richest opal fields in the world. We can' t make any guarantees |
|
