Special offers

Mineral Hardness Scale Ruler

Mineral Hardness Scale Ruler


In stock
15 available
0.30 lbs
Retail Price
Our Internet Price
$3.17 (Save 20%)


(from 1 to 15)

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.

  • Customers Also Bought

  • Customer Reviews

  • Send to Friend

  • Geology Underfoot in Illinois

    Illinois--a flat and boring state with nothing but cornfields and crowded expressways, right? Balderdash! Geology Underfoot in Illinois scratches the Prairie State's surface to expose geologic diversity that stretches back more than a billion years.

    Copious illustrations and witty, page-turning prose guide readers on geologic walking or driving tours of thirty-seven sites in Illinois. Enjoy an unexpected exploration of Chicago's architectural geology. Embark on a fault-seeking expedition in Mark Twain's big-river country. Or try moraine-surfing on Interstates 55 and 74. With a touch of curiosity and Geology Underfoot in Illinois in hand, you will view the state with a new sense of wonder.

  • Gem Trails of Texas

    Revised and expanded 2011 ninth edition of a popular best-selling guide to Gem Trails of Texas.
    Includes over 50 of the best sites in the state. Written by an experienced rockhound from the state. Includes a new color insert of the best fossils and rocks the state has to offer, detailed maps, numerous color and B/W photos, glossary, mineral index and clear, exact directions tell what to look for at each site. 175 pgs.
  • Gems & Minerals of California

    A handy pocket size field guide to the gems and minerals of California. The geology of California is extremely diverse. This creates a wide variety of gems and minerals found in the state. Not only does the book provide a description of the findings, but locations as well.
  • Gems and Minerals of Arizona

    There's gold in them thar hills! Along with silver, turquoise, copper, and tons (literally) of other minerals. This guidebook explains what you will find and where in Arizona you will find it. Prospectors were right on target when they came to Arizona! A handy pocker sized field guide to the gems and minerals of Arizona.
  • Midwest Gem, Fossil, and Mineral Trails: Great Lakes States by Zeitner

    Describes where and what to collect in Minnesota, Wisconsin,
    Indiana, Illinois, Michigan and Ohio. Learn how to hunt on your own, what collectibles can be found and how to preserve your specimens. 128 pgs.
  • Southwest Treasure Hunters Gem & Mineral Guide

    This guides offer state-by-state details on more than 250 gems and minerals the U.S. has to offer and affordable fee-dig sites where they can be found. Includes maps, illustrations and B/W photos.
  • Audubon Field Guide to Familiar Rocks & Minerals

    Covers North American Rocks & Minerals. Handy pocket sized book with more than 75 full-color, full-page photographs.
  • McGraw-Hill Dictionary of Geology & Mineralogy 2nd Edition

    Including more than 9,000 essential terms.
    Ccovers every discipline of geology & mineralogy.
    Provides synonyms, acronyms, and abbreviations.

    Derived from the world-renowned McGraw-Hill Dictionary of Scientific and
    Technical Terms, Sixth Edition
    , this vital reference offers a wealth
    of essential information in a portable, convenient, quick-find format. Whether
    you're a professional, a student, a writer, or a general reader with an interest
    in science, there is no better or more authoritative way to stay up-to-speed
    with the current language of geology and mineralogy or gain an understanding
    of its key ideas and concepts.

    Written in clear, simple language understandable to the general reader, yet
    in-depth enough for scientists, educators, and advanced students, The McGraw-Hill
    Dictionary of Geology & Mineralogy, Second Edition

    • Has been extensively revised, with 9,000 entries encompassing the language
      of geology and mineralogy

    • Includes synonyms, acronyms, and abbreviations

    • Provides pronunciations for all terms

    • Covers such topics as physical geology, historical geology, mineralogy,
      marine geology, plate tectonics, petrology, sedimentology, and stratigraphy

    • Includes an appendix containing tables of useful data and information

    • Is based on the McGraw-Hill Dictionary of Scientific and Technical Terms ? for
      more than a quarter-of-a-century THE standard international reference

    Carefully reviewed for clarity, completeness, and accuracy, the McGraw-Hill
    Dictionary of Geology & Mineralogy,
    Second Edition, offers
    a standard of excellence unmatched by any similar publication.

Customer Reviews

There have been no reviews for this product.

  Sign in to post a review

: *
: *
: *
Type the characters you see in the picture:




Recently Viewed