Granite Hardness
Believe it or not granite has many different harness to it. Now the talc is the softest of the minerals can be easily scratched with your fingernail and it is used in paints, and talcum power. Calcite is a little harder on the scale of hardness, you can barely scratch it with a copper penny and is used in limestone. Moving on up the scale of harness apatite you can barely scratch it with a knife blade and this is used in common fertilizers. Moving on up to the scale to quartz it is a common mineral and often one of most pretty ones, it can easily mark steel and hard glass and used as gemstones. If you visit this site http://www.natural-stone-interiors.com/granite-countertop.html you can see a list of others and their uses.
Posted by jvalone on 8/21/2009
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What is the hardness of your granite countertop? Your granite countertop hardness can be measured by using Moh's Scale of Relative Hardness.
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Depending on the feldspars and quartz portions, the total Mohs Hardness of granite is from 5.5 to 7. The darker the granite, the lesser is the quartz, and thus the lower is the hardness. Commercial granites are not affected by common organic acids such as a lemon acid and vinegar, contrary to marbles.
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Let's take a granite pegmatite for example. This might contain grains of topaz (H= 8), quartz (H=7), feldspars (H=6) and muscovite mica (H= 2.5). You could thus get a range of hardness depending on which grain you tested.
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The average density of granite is 2.75 g/cm3 and its viscosity at standard .... the Egyptians used emery shown to have higher hardness on the Mohs scale.
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Geology question: What is the Hardness of Granite on the Mohs scale of hardness? 2.75.
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Geology question: What is the hardness of granite according to Mohs scale of hardness? The Mohs Scale is used to determine the relative hardness of a...
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Mohs Scale of Mineral Hardness In 1812 the Mohs scale of mineral hardness was devised by the German mineralogist Frederich Mohs (1773-1839), who selected the ten minerals because they were common or readily available. The scale is not a linear scale, but somewhat arbitrary.
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The 3 main characteristic features of granite rock are: Hardness, Durability and Aesthetics and they are the primary reasons which make granite pavers...
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The ten-mineral Mohs scale of relative hardness, based on what scratches what. The Mohs Mineral Hardness Scale In terms of absolute hardness, diamond (hardness 10) actually is 4 times harder than corundum (hardness 9) and 6 times harder than topaz (hardness 8). Because it isn't made for that kind of precision,
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Intrusive rocks harden slowly beneath the surface of the earth, and often form large mineral crystals within the rock. Granite is a good example of an intrusive rock. Hardness The Mohs Hardness Scale, which is used my most mineral collectors, is based on the hardness of other minerals. It is on a scale of one to ten,
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