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Mohs Hardness Scale Set, Streak & Magnetism Test in Rocks & Minerals Test Kit For Sale


Mohs Hardness Scale Set, Streak & Magnetism Test in Rocks & Minerals Test Kit
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Mohs Hardness Scale Set, Streak & Magnetism Test in Rocks & Minerals Test Kit:
$35.00


Mohs Hardness Scale Set, Streak & Magnetism Test in Rocks & Minerals Test Kit
In this Kit 10 Minerals & the Accessories & Tools is Knife (Not Shipped By Air) Nail (Not Shipped By Air), Magnet (Not Shipped By Air), Iron Plate, Streak Plate, Glass Plate, Copper Plate, Iron Plate, Garnet Board, , Hand Lens, Acid Drop Bottle (Empty) & Instruction Manual for Doing These Test.
Rocks & Minerals Test Kit with Mohs Hardness Scale Set,
Streak & Magnetism Test
Mohs Hardness Test
Determining the hardness of an unknown rock or mineral is often very useful in the identification process. Hardness is a measure of a mineral\'s resistance to abrasion and is measured against a standard scale - Mohs Scale of Hardness. Mohs Scale was named after Frederick Mohs (1773-1839), a German minerologist. It consists of 10 fairly common minerals (except for the diamond) of known hardness which are numerically ordered from the softest (1) to the hardest (10).They are:1. Talc (H=1)2. Gypsum (H=2)3. Calcite (H=3)4. Fluorite (H=4)5. Apatite (H=5)6. Orthoclase (H=6)7. Quartz (H=7)8. Topaz (H=8)9. Corundum (H=9)10. Diamond (H=10)
As common sense dictates, Mohs Scale is based on the fact that a harder material will scratch a softer one. By using a simple scratch test, you can determine the relative hardness of an unknown mineral.
The Mohs scale is strictly a relative scale, but that\'s all that anyone needs. In terms of absolute hardness, diamond (hardness 10) actually is four times harder than corundum (hardness 9) and six times harder than topaz (hardness 8). The scale uses half-numbers, but nothing more precise, for in-between hardnesses. For instance, dolomite, which scratches calcite but not fluorite, has a Mohs hardness of 3½ or 3.5.
\"Tools\" for Testing Hardness
Believe it or not, most people do not normally carry around samples of the 10 minerals on the Mohs Scale! However, there are several simple \"tools\" people often have with them that can be useful in determining the relative hardness of an unknown mineral specimen.
For example:
Your fingernail has a hardenss of 2.5. If you can scratch the surface of an unknown specimen with it, you will immediately know that its hardness is less than 2.5. In other words, it is slightly harder than gypsum (H=2) but softer than calcite (H=3).
A penny or Copper Plate has a hardness of 3.0 - slightly harder than your fingernail. So, if you can\'t scratch the specimen with your fingernail (H=2.5), but a penny does the job, you immediately know that it is at least as hard as calcite (H=3). You can scratch the copper plate by specimen for this Test.
A Iron Nail or Iron Plate has a hardness of 4.5 slightly harder than Copper Plate. If the penny does not scratch the Specimen but Iron Nail does, then you can correctly conclude that its hardness is H=4 (Fluorite)
The Steel Knife, Glass Plate usually has a hardness of about 5.5. If Iron Nail does not scratch your unknown specimen but the Steel knife blade does, then you can correctly conclude that it is harder than Fluorite (H=4) but softer than orthoclase (H=6).
A Streak Plate has a hardness of 6.5 slightly harder than Glass Plate & Knife. If the Knife does not scratch the Specimen but if specimen scratched the Streak Plate, then you can correctly conclude that its hardness is H=6 (Orthoclase)
A Emery Sand Paper or Garnet Paper is used to identify the Hardness of specimen between 7 to 9. Quartz (H=7), Topaz (H=8), Corundum (H=9) are the Examples.
Other Minerals Test
MagnetismMagnetism can be strong, weak or non-existent in minerals. Test magnetism with a magnet. The specimen is non-magnetic if it is not at all attracted to a magnet. It is weakly magnetic if it has a slight attraction to a magnet and strongly magnetic if it has a strong attraction to a magnet. For Example Magnetite is Strongly Magnetic.
ACID REACTIONSome minerals are carbonate compounds that dissolve rapidly in acid, producing bubbles or “fizz.” Test a specimen for this property by placing a drop or two of dilute hydrochloric acid on it. It will produce tiny bubbles if it is composed of carbonate. Dilute 1 part concentrated hydrochloric acid with 3 parts water to make dilute hydrochloric acid. Vinegar will also work, although not as well with some minerals.
THE STREAK OF A MINERALA streak is the color of a mineral in powder form. It is determined by rubbing a specimen across a ceramic plate. The streak is an important identifying characteristic, especially of metallic minerals. The streak of some minerals is similar to the mineral color in lump form. In other minerals that streak is very different from the mineral color. Minerals with a hardness above 6.5 have a colorless streak because they are too hard to leave a streak on the plate.Wash your ceramic plate with soap and water as necessary to clean it.
The Knife (Scalper), Magnet, Nail is not shipped by Air due to Carrier / AirTraffic Policy. So you can manage it in your Own Country. Pls Be Sure beforepurchase.

Specimen Names Change Time to Time without any Notice for Making Variety or Lack of Stock.

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