The Mineral Hardness Ruler is a stimulating visual aid, educates in one phase of mineralogy, and provides the standard ruler measurement scales needed in classes.
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.
On one side of the ruler are pictures of the ten common minerals, in full color, selected by Mohs for his relative hardness scale. On the reverse side of the ruler are six common items with their relative hardnesses. These items, along with known minerals, can be used as a handy field kit to test the relative hardness of an unknown mineral.
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.
Minerals, a deluxe field guide and mini-encyclopedia for amateur geologists,
rock collectors, and nature lovers.
This Barron's guide is a new kind of book for identifying minerals, one that even beginners can use to make quick, sure identifications. The simple, easy-to-understand profiles are supplemented by sketches of crystals made by the author especially for this book and based on the most up-to-date crystallographic data. It is a field guide to mineral deposits, categorized by streak color and degree of hardness for fast, easy identification. Paperback / 237 Pages / 5-3/4 x 8-1/2 / 1994
The Deluxe Moh's Hardness Pick Set now comes in two case types. The wooden case is small enough to carry and the top screws into the base to make a perfect desk stand. The plastic case is longer but the thinner size makes it easier to carry in your field tool set.Hardness is an important and quantifiable physical characteristic of a mineral and in your effort to identify an unknown mineral, the hardness, if known, combined with other properties, can narrow your search to just a handful of possibilities. Simply scratch a smooth surface of your unknown mineral with the picks of various indicated hardness. As an example, if a No. 5 pick scratches the mineral, but a No. 4 pick does not, then your mineral hardness is 4.5. Then compare this against a table of minerals listing hardness values to aid in identifying the unknown mineral.
Truly the finest magnifiers Bausch & Lomb has to offer, Hastings Triplet Magnifiers incorporate three separate lenses, bonded together to form a compound lens to provide sharp, very distinct magnified image without distortion.A swing-away, nickel-plated case protects the lens and serves as a handle.
|Head Width||Overall Length||Head Weight||Total Weight|
|7 inches||16 inches||22 ounces||2 pounds 1.1 ounce|
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