The Geology of Gem Deposits
Author : Lee Andrew Groat
Publisher :
Page : 330 pages
File Size : 23,19 MB
Release : 2007
Category : Science
ISBN :
Author : Lee Andrew Groat
Publisher :
Page : 330 pages
File Size : 23,19 MB
Release : 2007
Category : Science
ISBN :
Author : Sam L. VanLandingham
Publisher : Van Nostrand Reinhold Company
Page : 424 pages
File Size : 31,55 MB
Release : 1985
Category : Nature
ISBN :
Author : P.C. Keller
Publisher : Springer Science & Business Media
Page : 315 pages
File Size : 28,69 MB
Release : 2012-12-06
Category : Science
ISBN : 1468466747
Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.
Author : Vandall T. King
Publisher :
Page : 540 pages
File Size : 28,51 MB
Release : 1994
Category : Minerals
ISBN :
Author : Panagiotis Voudouris
Publisher : MDPI
Page : 528 pages
File Size : 11,90 MB
Release : 2020-03-10
Category : Science
ISBN : 3039280767
Gems have been used in the manufacture of jewellery and as ornaments since antiquity. Considering gems, recent statistics have shown that about 15 billion Euros are annually at stake. Nowadays, gemmology, i.e., the study of gem materials, is one of the most expanding fields in the earth sciences, positioned between academia and industry. As an applied science, in gemmology, the instruments used should be non- or microdestructive, and their cost should be reasonable both in terms of equipment and time consumption. Gemmology can also be used contribute to the development of pure science and in some cases, destructive techniques may have to be used. Taking into account the fact that gems are albeit rarely available for scientific research, this compilation of 20 articles by around 100 researchers from over 30 different institutions situated in 20 countries from around the globe, presented in the Special Issue entitled “Mineralogy and Geochemistry of Gems”, offers very good examples on the application of various methods for their study which will hopefully contribute to our better understanding of gem formation in general and will enhance scientific debates attracting more scientists from various disciplines to get involved in this field.
Author : Gary W. Bowersox
Publisher : GeoVision, Inc.
Page : 544 pages
File Size : 48,95 MB
Release : 2004
Category : Biography & Autobiography
ISBN : 9780974732312
This is the story of one man's endeavor to discover precious gems and to lead a life filled with loyal friends and extraordinary adventures. He finds it all in the Hindu Kush region of Afghanistan but not without risking his life. In this book Gary W. Bowersox spins his tales of thirty two years of discovery both introspective and worldwide. Along the way he encounters danger and intrigue as he builds lasting friendships. He has traded gems and stories with Afghan miners, ethnic peoples, freedom fighters, government officials, scientist, and on a few occasions, international spies.
Author : W. Dan Hausel
Publisher : Createspace Independent Pub
Page : 370 pages
File Size : 32,54 MB
Release : 2014-09-25
Category : Nature
ISBN : 9781502513885
Follow in the footsteps of successful gem and gold hunters and search the hills for rough diamonds, colored gemstones, lapidary minerals, precious metals and interesting minerals and rocks. Written for the geoscientist, prospector and rockhound; the first part of the book focuses on physical characteristics of gems and minerals. This is supplemented with the second part of the book that describes dozens upon dozens of colored gem, diamond, gold, mineral and rock localities using the Public Land Survey System and GPS coordinates so the reader can visit these sites on a home computer with aerial and satellite imagery to gain an understanding of what to look for in the field. With these same coordinates, the reader can visit some occurrences, deposits and areas suggested for prospecting to further their gem hunter prospecting education and potentially lead to new discoveries. Now you can learn what to look for when searching for Mother Nature's treasure.
Author : Garret Romaine
Publisher : Rowman & Littlefield
Page : 177 pages
File Size : 37,58 MB
Release : 2015-09-01
Category : Nature
ISBN : 149301482X
Rocks, Gems, and Minerals is a field guide to more than 100 of the most common and sought-after rocks, gems, and minerals hidden throughout North America. Conveniently sized to fit in your pocket and featuring full-color, detailed photographs, this informative guide makes it easy to identify rocks in your backyard and beyond. Also included is an introduction that covers fundamental geology information and interesting facts. This is the essential source when you're out in the field, both informative and beautiful to peruse.
Author : Mineralogical Association of Canada
Publisher :
Page : 405 pages
File Size : 17,17 MB
Release : 2014
Category : Diamond deposits
ISBN : 9780921294542
Author : Richard W. Hughes
Publisher :
Page : 816 pages
File Size : 31,8 MB
Release : 2017-01-01
Category :
ISBN : 9780964509719
From the dawn of time, ruby and sapphire have both attracted and fascinated humans in ways that few other items could.While objects of desire are found throughout the natural world, physical beauty is too often ephemeral. From the allure of a man, woman, flower or butterfly, through the fleeting moments of a sunset, there is little that lasts and practically nothing that can be passed down to our descendants. The exception is precious stones. Not only are they the most durable creations of mother nature, but their visual splendor is truly eternal.In this companion to his 2013 book, Ruby & Sapphire--A Collector's Guide, Richard Hughes examines these gems from the gemological standpoint, delving into these gems not just from the aesthetic, but also from the scientific point of view.The product of nearly 40 years of firsthand experience, it covers every aspect of the subject from A-Z. History, sources, prices, quality analysis, synthetics and treatments, everything is here. Ruby & Sapphire--A Gemologist's Guide represents the most comprehensive book ever written on a single precious stone. With over 1000 photos, maps and illustrations and 3500 references, it is nothing less than a tour-de-force of gemological scholarship.