Gem Trails of Texas


Gem Trails of Texas

  • Gem Trails of Texas
  • Gem Trails of Texas


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SKU
GB-28020001
In stock
4 available
Weight
1.10 lbs
Retail Price
$14.95
Our Internet Price
$11.21 (Save 25%)

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(from 1 to 4)


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.
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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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    Solid research leads you to areas where your most likely to find precious minerals like gold and silver and the collectible minerals associated.
    • Topographic 1:500,000 scale maps. In most cases all streams, washes, canyons, mountains and other features are shown.
    • Accurate and complete. Down to the last detail. Shows towns, highways, secondary roads, railroads, state and national parks, airports, etc.
    • From state and federal records. US and state Geological Survey Services, and some private sources.
    • Easy to carry, easy to use. You don't have one large sheet which is difficult to handle as with some map companies. Our maps are on 11 x 17 sheets. You can pick out the sheet you want to use and not be bothered with the others.
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  • Lanyard, BelOMO Woven Logo, 3/4in Nylon with Quick Release Buckle and Split Ring

    Lanyard, BelOMO Woven Logo, 3/4in Nylon with Quick Release Buckle and Split Ring

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    Here is a heavy duty 3/4" nylon loupe lanyard with a quick release buckle and a split ring. Disconnect the buckle when you don't need the neck lanyard. But don't set the loupe down and walk way!

    Important: We offer this lanyard for no additional charge when you buy the combo package of the BelOMO loupe with attached lanyard. Attaching the lanyard requires a screw to be removed so let us do it. We've been doing it for years and you save money!

    Use the split ring on loupes with a mounting hook. Remove the split ring, remove one screw on your BelOMO loupe, swivel the frame out of the way and slide the end over the support shaft. Do not use the split ring to attach the lanyard to the loupe. (We suggest that you purchase the loupe with the lanyard already installed.)

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    This most complete guide to Northern California features sites from the Oregon border south to San Luis Obispo. Beautiful color photographs showcase the specimens that can be found at the sites described. Detailed text and maps make locating collecting areas easy. 160 pgs.
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