Physical Properties of Gneiss
Physical properties of rocks are used to identify the type of rocks and to discover more about them. There are various physical properties of Gneiss like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it. The physical properties of Gneiss rock are vital in determining its Gneiss Texture and Gneiss Uses.
Hardness and Strength of Gneiss
The physical properties of Gneiss depend on its formation. Physical properties of rocks play an important role in determining its applications in various fields. Rocks are rated on the on the Moh's Hardness Scale which rates the rocks on the scale from 1 to 10. Rocks with hardness 1-3 are soft rocks from 3-6 are medium hardness rocks and 6-10 are hard rocks. The hardness of Gneiss is 7 whereas its compressive strength is 125.00 N/mm2. Streak is the color of rock when it is crushed or powdered. The streak of Gneiss is white whereas its fracture is irregular. Luster of Gneiss is the interaction of light with the surface of Gneiss. Luster of Gneiss is dull. Gneiss cleavage is poor. The specific gravity of Gneiss is 2.5-2.7. Gneiss is translucent to opaque in nature whereas its toughness is 1.2. You can also know all the list of rocks in Opaque Rocks, Translucent Rocks and Transparent Rocks.