Bobs Geology Guide Series Quick Guide to Minerals


Bobs Geology Guide Series Quick Guide to Minerals

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SKU
FG-00000001
In stock
31 available
Weight
0.45 lbs
Retail Price
$7.95
Our Internet Price
$6.76 (Save 15%)

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Handy field guide to minerals. Laminated.
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    Rockhounds, mineral enthusiasts, students, teachers, geologists, and any one interested in rocks and minerals will find the Mineral Hardness Ruler a handy visual aid for quick information on mineral hardness.



    The two-sided, flexible, glossy, vinyl ruler consists of five scales: three measurement scales and two mineral hardness scales. The measurement scales are in standard ruler measurements of tenths of inches, sixteenths of inches, and millimeters. Mohs' relative hardness numbers are integrated into the inch scales, while a separate scale exists for an absolute mineral hardness scale by Rosiwal.


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    Hardness is one property of a mineral that can be used to distinguish among similar minerals. A given mineral can scratch any other mineral of the same or softer hardness. Over a hundred years ago, the German mineralogist Frederick Mohs devised the relative hardness scale that has found favor with mineralogists for over a century. Others, such as Rosiwal, formed absolute hardness scales using the same minerals as Mohs. For example, diamond, the hardest substance in Nature is not twice as hard as apatite, 10 versus 5, but over twenty thousand times as hard, 140,000 versus 6.5.

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    Geology, An Introduction to Familiar Rocks, Minerals, Gemstones & Fossils, is a must-have reference guide for beginners and experts alike. With this indispensable guide, learn how to identify common species of North American rocks, gems, minerals and fossils. Maps show the distribution of familiar rocks and minerals across North America. Also, included are helpful tips on how to begin, where to look, tools and methods. The Pocket Naturalist series is an introduction to common plants and animals and natural phenomena. Each pocket-sized, folding guide highlights up to 150 species and most feature a map identifying prominent sanctuaries and outstanding natural attractions. Each is laminated for durability. (31/2 X 81/4 folded, opens to 22 X 81/4, color illustrations, maps)
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    Learn more about the geological history of the rocks around you! This colorful, educational map presents state/regional surface rock outcrop information?age, depositional environment, rock type, and names of formations. Includes major highways, towns, and landmarks. Printed on a single sheet and folded to glove compartment size, has a stratigraphic column by state, mileage charts. Scale: 1 inch=30 miles. Maine, Vermont, New Hampshire, Massachusetts, Connecticut, Rhode Island, New York, New Jersey, Pennsylvania. Revised 1995.
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