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SEARCH OUR STORE Store Policies : : Visit Our Store : : About Us : : Contact Us : : Checkout ONLY ONE EASY TO CALCULATE FLAT RATE SHIPPING FEE ON MULTIPLE ITEM PURCHASES The Single Highest S hipping Charge For All Of The Items That You Buy Continental United States Only UPS or USPS - OUR CHOICE Includes Insurance. Tracking, Handling and Packing Does Not Apply To International - Please Read Below Large Case Packs Not Included Scale of Hardness Rocks and Minerals Crystals Stone
Description
MINERALS IN THE SCALE OF HARDNESS The determination of the hardness of a mineral can be an important step toward its identification. Hardness is the resistance which he smooth surface of a mineral offers to being scratched. A diamond is the hardest of all substances and can only be scratched by another diamond. Over a century ago, Friedrich Mohs by experimentation made up a scale of hardness which is referred to as Moh's scale. It does not imply an exact hardness, but is set up so that any mineral can scratch all those beneath it in the scale, or can be scratched by those above it in the scale. Since diamond is the hardest it is given the number 10; talc is the softest so it is given number 1. Quartz is often used as a division in the scale and all those above 7 are called hard minerals. 1. Talc 6. Feldspar 2. Gypsum 7. Quartz 3. Calcite 8. Beryl 4. Fluorite 9. Corundum 5. Apatite 10. Diamond Some very familiar objects can be used in conjunction with this scale. A fingernail has the hardness of 2.5, a copper coin between 3 and 4, a nail about 5, common window glass 5.5, a steel file or porcelain tile 6.5. Other minerals are sometimes substituted in the scale such as topaz for beryl since they both have a hardness of 8. Grades 6-12
Please be advised that after your purchase , you will be directed to our website to check out Your purchase will be automatically combined and one price shipping will be applied . You will be given the opportuinity to add to your order with no additional shipping. A link to pay by Pay Pal will be provided on the first page of check out so that you do not have to enter your shipping information into our system. If you prefer to pay by credit card, money order or check, you will be required to enter your current billing and shipping information into our system, as Ebay does not provide us with this information. The use of our own website checkout system insures accuracy, streamlines tracking and shipping and helps us to keep better records and ensure better service. Our checkout system is guaranteed to be secure. If you have trouble with checkout, please call for help. See below for International Shipping Policies
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GENERAL SHIPPING POLICIES: Take the single highest shipping charge from all the items you have bought and that is your shipping. i.e. If you buy 50 items and the highest charge is $ 8.95 on any item, that is your total shipping charge. This will save you money and simplify the checkout process. Buy what you want for one single low-priced shipping charge. All of our shipping fees include insurance, tracking, handling and packing. Please read below for international shipping policies, this policy does not apply to international. We will ship either UPS or USPS, our choice. If you have a preference of shipping, please specify in the notes and we will try to accomodate or we will contact you. When email addresses are provided, customers can expect email notification and tracking numbers. All shipments are insured based on approximate value of the contents. If you do not hear from us for any reason, please contact us, so that you receive the service you expect. We will inform you of any back orders. We try our best to have a perfect inventory and ship promptly, but sometimes mistakes happen. If delivery time is an issue for you please call us at Monday-Friday 8-5 CST or contact us through the E-Bay Contact Seller Form. If a package is...

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