Found 2406 Rocks And Minerals Products.
The Smithsonian Handbook of Rocks and Minerals combines 600 vivid full--color photos with descriptions of more than 500 specimens. This authoritative and systematic photographic approach, with words never separated from pictures, marks a new generation of identification guides. Each entry combines a precise description with annotated photographs to highlight the chief characteristics of the rock or mineral and distinguishing features. Color--coded bands provide a clear, at--a--glance facts for quick reference. In addition, each mineral entry features an illustration showing the crystal system to which the mineral belongs. Designed for beginners and experienced collectors alike, the Smithsonian Handbook of Rocks and Minerals explains what rocks or minerals are, how they are classified, and how to start a collection. To help in the initial stages of rock identification, a clear visual key illustrates the differences between igneous, metamorphic and sedimentary rocks, then guides the reader to the correct rock entry. A concise glossary provides instant understanding of technical and scientific terms
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Homer called salt a divine substance. Plato described it as especially dear to the gods. Today we take salt for granted, a common, inexpensive substance that seasons food or clears ice from roads, a word used casually in expressions ("salt of the earth," take it with a grain of salt") without appreciating their deeper meaning. However, as Mark Kurlansky so brilliantly relates in his world- encompassing new book, salt-the only rock we eat-has shaped civilization from the very beginning. Its story is a glittering, often surprising part of the history of mankind.Until about 100 years ago, when modern chemistry and geology revealed how prevalent it is, salt was one of the most sought-after commodities, and no wonder, for without it humans and animals could not live. Salt has often been considered so valuable that it served as currency, and it is still exchanged as such in places today. Demand for salt established the earliest trade routes, across unknown oceans and the remotest of deserts: the city of Jericho was founded almost 10,000 years ago as a salt trading center. Because of its worth, salt has provoked and financed some wars, and been a strategic element in others, such as the American Revolution and the Civil War. Salt taxes secured empires across Europe and Asia and have also inspired revolution (Gandhi's salt march in 1930 began the overthrow of British rule in India); indeed, salt has been central to the age-old debate about the rights of government to tax and control economies. The story of salt encompasses fields as disparate as engineering, religion, and food, all of which Kurlansky richly explores. Few endeavors have inspired more ingenuity than salt making, from the natural gas furnaces of ancient China to the drilling techniques that led to the age of petroleum, and salt revenues have funded some of the greatest public works in history, including the Erie Canal, and even cities (Syrac
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Random House Audubon Field Guide- Rocks/Minerals
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From Wikipedia: A gemstone or gem (also called a precious or semi-precious stone, a fine gem, or jewel) is a piece of mineral, which, in cut and polished form, is used to make jewelry or other adornments.[1][2] However certain rocks, (such as lapis lazuli) and organic materials (such as amber or jet) are not minerals, but are still used for jewelry, and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity until the 19th century engraved gems and hardstone carvings such as cups were major luxury art forms; the carvings of Carl Fabergé were the last significant works in this tradition. ~~~ The traditional classification in the West, which goes back to the Ancient Greeks, begins with a distinction between precious and semi-precious stones; similar distinctions are made in other cultures. In modern usage the precious stones are diamond, ruby, sapphire and emerald, with all other gemstones being semi-precious.[3] This distinction reflects the rarity of the respective stones in ancient times, as well as their quality: all are translucent with fine color in their purest forms, except for the colorless diamond, and very hard,[4] with hardnesses of 8-10 on the Mohs scale. Other stones are classified by their color, translucency and hardness. The traditional distinction does not necessarily reflect modern values, for example, while garnets are relatively inexpensive, a green garnet called Tsavorite, can be far more valuable than a mid-quality emerald.[5] Another unscientific term for semi-precious gemstones used in art history and archaeology is hardstone. Use of the terms 'precious' and 'semi-precious' in a commercial context is, arguably, misleading in that it deceptively implies certain stones are intrinsically...
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For goldsmiths, collectors, jewelry-makers, investors, retailers and consumers. The trade of gemstones is a highly specialized and often secretive business. Using The Jeweler's Directory of Gemstones, written by an expert gemstone dealer and designer, will provide any consumer with the insider knowledge needed to make accurate judgments of gemstones, to recognize low- and high-quality stones, and to make a good buy rather than a bad one. Each full-color spread is packed with concise text, annotated drawings and beautiful photographs, including a showcase of virtuoso jewelry designs. Great for informed consumers, the book includes: Sources and grading Traditional and modern settings Cutting and faceting Designing a special setting Gemstone groups Appraising, buying and handling gemstones Diamond types and pearls Spotting synthetics and fakes. Here is a sampling of the practical insider information in this book: Using a loupe to examine a stone Understanding laser cutting and carving Identifying synthetic diamonds Buying at gem fairs and from dealers Cleaning and storing stones. No other book has this kind expert advice -- up-to-date, clearly presented and fully illustrated -- on evaluating and using gemstones. (20061101)
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Three Guides in One! Identification, Values, Lapidary UsesDesigned with beginners in mind, yet filled with valuable technical information for advanced collectors, Collecting Rocks, Gems and Minerals takes you from being just someone who appreciates rocks to a true "collector."Easy-to-use, quick reference format arranged by category and color of stoneCovers both lapidary and mineral display materialsProvides values and tips for locating, buying and collectingIncludes organics such as amber, bone, coral, pearl and shellLists chemical group, system, hardness, opacity, fracture, specific gravity and moreContains more than 650 full-color photosForeword by Johann Zenz, world renowned agate expert, author and lecturer
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Gemstones of the World is the single, cornerstone volume that every hobbyist, jeweler, jewelry maker, and rockhound needs. And this updated edition contains a new chapter on the treatment of gemstones, expanded information on whatâs “New on the Market,â and 400 additional stones.More than 1,500 full-color photos showcase each precious and semiprecious stone in its rough, natural, polished, and cut renditions. Each entry offers complete information on the gemstoneâs formation, structure, physical properties, and characteristics, along with the best methods of working, cutting, and polishing it. There are even full treatments of lesser-known gems; a special section on rocks as precious stones; and organic gem materials. Charts and tables (including the “double fractionâ figures that experts want) help collectors identify unknown gemstones and check for genuineness.Â
Price : $16.30
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"To see a world in a grain of sand, And a heaven in a wild flower. To hold infinity in the palm of your hand, And eternity in an hour." William Blake, "Auguries of Innocence" 1805 Here is the world viewed within a grain of sand, thanks to the stunning three-dimensional microphotography of Dr. Gary Greenberg. To some, all sand looks alike--countless grains in a vast expanse of beach. Look closer--much closer--and your view of sand will never be the same. Employing the fantastic microphotographic techniques that he developed, Greenberg invites readers to discover the strange and wonderful world that each grain of sand contains. Here are the sands of Hawaii and Tahiti, the Sahara and the Poles, a volcano, each exquisitely different, and each telling a fascinating geological story. Red sand and yellow, white sand and black, singing sand and quicksand: Greenbergs pictures reveal the subtle differences in their colors, textures, sizes, and shapes. And as this infinitesimal world unfolds so does an intriguing explanation of how each grain of sand begins and forms and finds itself in a particular place, one of a billion and one of a kind.
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From exploring the basic principles of geology to starting a rock and mineral collection, The Practical Geologist is the perfect introduction to the world of earth science. Beginning with a history of the earth's formation and development, this book explores the substances that compose the planet, movements within the earth, the surface effects of weather and water, and underground landscapes. It shows you how to search for, identify, and extract samples of various rocks and minerals, and for each rock and mineral type there is a brief mineralogy and explanation of its locations. There are also sections on mapping, preparing, and curating specimens, and geological sites on the six continents. Packed with more than 200 full-color illustrations, this comprehensive guide is the essential practical companion for natural science enthusiasts everywhere.
Price : $10.78
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1997 - Harper Collins - Let's Read & Find Out Science - Stage 2 - "Let's Go Rock Collecting" - A Reading Rainbow Book - By Roma Gans / Illustrated by Holly Keller - 32 Pages - Full Color - Like New - VG+ Condition - School Library Book - Collectible - Great Children's Gift
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