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The Rock Box - Geological Oddities


The Rock Box - Geological Oddities

Details

SKU
ED-00007966
In stock
15 available
Weight
1.10 lbs
Retail Price
$14.76
Our Internet Price
$12.55 (Save 15%)

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(from 1 to 15)


A great collection of nine pecimens all enclosed in a special plastic case and all with identifying labels and information. Perfect for that young budding geologist! "The Rock Box - Geological Oddities" includes: Iceland Spar, Talc, Graphite, Selenite Rose, oil shale, Kimberlite, Quartz, Fluorite, and Geode.
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    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.

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  • Pocket Naturalist Geology

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  • The Rock Box - Minerals

    A great collection of nine specimens all enclosed in a special plastic case and all with identifying labels and information. Perfect for that young budding geologist! "The Rock Box - Minerals" includes: Calcite, Epidote, Fluorite, Magnetite, Microcline, Olivine, Pyrite, Amethyst, Rose Quartz.
    ED-00007964
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  • The Rock Box - Igenous

    A great collection of nine specimens all enclosed in a special plastic case and all with identifying labels and information. Perfect for that young budding geologist! "The Rock Box - Igenous" includes: Andersite, Basalt, Gabbro, Granite, Obsidian, Pumice, Rhyolite, Scoria, and Syenite.
    ED-00007960
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  • The Rock Box - Sedimentary

    A great collection of nine specimens all enclosed in a special plastic case and all with identifying labels and information. Perfect for that young budding geologist! "The Rock Box - Sedimentary" includes: Arkrose, Conglomerate, Dolomite, Gypsum, Limestone, Fossil Limestone, Sandstone, Shale, and Travertine.
    ED-00007962
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    Glass plates for use in basic mineral identification. Minerals with a hardness of 6 or higher will scratch glass making a glass streak plate a handy tool for quick test to establish on which half of the hardness scale your specimen exists. Rocks and minerals that scratch glass, and do not have cracks and pits, are those that readily take a polish in a tumbler. 1 inch by 2 inch.
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  • The Rock Box - Metamorphic

    A great collection of nine specimens all enclosed in a special plastic case and all with identifying labels and information. Perfect for that young budding geologist! "The Rock Box - Metamorphic" includes: Amphibolite, Anthracite, Gneiss, Hornfel, Marble, Phyllite, Quartzite, Schist, and Slate.
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