Found 2457 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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History. A substance so valuable it served as currency, salt has influenced the establishment of trade routes and cities, provoked and financed wars, secured empires and inspired revolutions.
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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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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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National Audubon Society Field Guide: Rocks & Minerals
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Rocks are composed of one or more minerals necessary to sustain life as we know it. Rocks also act as an impenetrable skin, shielding us from the molten hot magma that resides inside the earth. Come with us to explore the exciting world of rocks and minerals! Brought to you by the HLN Family Publishers - an award-winning publisher of education content and unit studies on the web. Each unit contains explanatory content and is chock full of online resource links and book suggestions. Also included: 6-8 lesson plans and 2-10 worksheets. Days and days of learning and exploration within each unit! This unit study uses age-appropriate, reviewed links across the web to further your knowledge on this topic. It is best utilized with an internet connection. Great for homeschoolers, teachers, and anyone interested in having fun learning more about this topic.
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An easy-to-use field guide.
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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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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.
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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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