 | | Book | | radiating structure. Opposite: gold on quartz from California. CONTENTS INTRODUCTION 7 THE MINERAL KINGDOM...The spellings of names follow CIM; thus pyrite, baryte and sylvine replace the older pyrites, barytes...states of Guanajuato and Chihuahua, Mexico. In the USA silver occurs at Keweenaw, Michigan, in association...Corocoro, Bolivia, and at Cananea, Mexico. In the USA copper is found in abundance in the Keweenaw area...from South Africa, Above: Gold on quartz from California. Such a specimen would command very high prices |  | | Book | | hexagonal (sixfold) symmetry illustrate the next point. (SiO4)*~ must be bonded to a cation or cations...scraps of matter are built into minerals. At this point is is necessary to restrict our scope a little....oriented bonds in covalent structures usually point in the same directions as the principal axes of...extremely common in most mineral groups. At this point we must return to the subject of chemical formulae...only other relatively common sulphate mineral is baryte, BaSO,, which typically occurs in veins deposited | | | Book | | AND GEMSTONES. 2250 MAk âą Z 1994 â San Mateo Public Library San Mateo, CA 94402 âQuestions Answeredâ...hexagonal Jsixfold) symmetry illustrate the next point. (Si04)4- must be bonded to a cation or cations...scraps of matter are built into minerals. At this point is is necessary to restrict our scope a little....the oriented bonds in covalent structures usually point in the same directions as the principal axes of...closely common in most mineral groups. At this point we must return to the subject of together by a three-dimensional |  | | Journal (issue) | | are topaz and tourma lines. Gold was found in California in 1848, sparking off the Great American Gold...Apatite- Can be scratched with difficulty by a steel point, and can itself scratch glass, but with difficulty...(Germany); Chihuahua and Zacatecas (Mexico). In the USA, there are large quantities of acanthite at Leadville...Zealand, in Siberia (Russia) and in Alaska and California, USA. The Alaskan deposits are found close to significant...byssolite is found mainly in Pennsylvania and Virginia, USA. FACT FILE ACTINOLITE Group: Silicates Crystal |  | | Book (edition) | | Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture), dept...always included in text, except in the cases of the USA, UK, and the provinces Ontario and Quebec in Canada...Uintah County. Utah. and m (2.B. acanthite group). Monoclinic, C2/m, a,b,c Rio Blanco County. Colorado...Windsdor co., Vermont, at Wrightwood, San Bernardino co., California, in fine crystals in talc near Wenatchee |  | | Journal (volume) | | South Africa; and Maine and other regions of the USA. Minor deposits of rose quartz can also be found...ite . corundum is a very hard mineral and defines point 9 on the hardness scale. This hardness makes ruby...in Afghanistan , India, Pakistan, China, Montana, USA, and Norway. âą âą TWo 19th-centurv brooches set with...at the Smithsonian Institution in Washington, DC, USA. âą A Burmese ruby in calcite, a common mineral....pyramid with four triangular faces coming to a point at the top and four more making a pyramid beneath |  | | Book | | Jamais ia fcience des minĂ©raux nâa Ă©tĂ© portĂ©e au point de perfection oĂč elle dt parvenue aujourdâhui chez...en parles idĂ©es qui doivent nous conduire Ă ce point de perfection , ne pourront avoir leur entier...diffĂ©- une fuite mines rentes en rĂ©unifiant , fort confidĂ©rable dâĂ©chantillons trĂšs-rares & cet trĂšs-importans...aux vues les plus Ă©levĂ©es , & arriver Ă ce haut point de contemplation, oĂč lâhomme j par une fait fuite...lâĂ©tat , qui devien- dâefclavĂ ge, oĂč & oĂč point de propriĂ©tĂ© nâa font, encore de ce bel attribut |
|
