Rhyolite Stones
Name and Composition - Similar to granites but somewhat richer in silica. Mainly comprises assemblage of quartz-feldspar as main minerals and biotite, muscovite, amphbloles etc. as accessory minerals.
Physical Properties - Reddish to grey coloured, fine granied to glassy acid volcanic rock.
Mode of Occurrence - Occurs in the form of mounds, sheets etc.
Uses - Rhyolite is used as road ballast, chips and masonary stone. Small khandas can be used for extraction of slabs/tiles.
Mineral based Industries – Crushing plants for road ballast and chips.
Industrial Prospects – Crushing Units, small scale tiling plants.
Physical Properties
Hardness
Sp. gr.
Water absorption
Density
Compressive strenght
Modulus of rupture
Sp. gr.
Water absorption
Density
Compressive strenght
Modulus of rupture
4 to 4.5
2.60
1.25 %
2.51 g/cm3
390 Kg/cm3
220 Kg/cm3
2.60
1.25 %
2.51 g/cm3
390 Kg/cm3
220 Kg/cm3
Chemical Properties
Lime (CaO)
Silica (SiO2)
Alumina (Al2O3)
Ferric Oxide (Fe2o3)
Manesium Oxide (MgO)
Loss On Ignition (LOI)
Silica (SiO2)
Alumina (Al2O3)
Ferric Oxide (Fe2o3)
Manesium Oxide (MgO)
Loss On Ignition (LOI)
0.28 to 0.32%
90 to 95%
2 to 3%
1.20 to 1.4%
0.20 to 0.30%
0.50 to 0.60%
90 to 95%
2 to 3%
1.20 to 1.4%
0.20 to 0.30%
0.50 to 0.60%
Indian Minerals
Metallic Minerals
Cadmium Ore
Copper Ore
Lead Ore
Zinc Ore
Iron Ore
Manganese Ore
Tungsten Ore
Bauxite Ore
Limestone and Dolomite
Limestone
Dolomite
Fertilizer Minerals
Gypsum
Pyrite
Rock Phosphate
Saltpeter
Fuel Minerals
Lignite
Glass and Ceramic Minerals
Ball Clay
China Clay
Feldspar
Fire Clay
Kyanite
Quartz
Quartzite
Silica Sand
Precious and Semiprecious Minerals
Aquamarine
Emerald
Industrial Minerals
Asbestos
Barytes
Bentonite
Calcite
Fluorite
Fuller's Earth
Garnet
Graphite
Magnesite
Mica
Mill Stone
Ochre
Pyrophylite
Siliceous Earth
Silimanite
Soapstone
Vermiculite
Wollastonite
Dimensional and Building Stone
Granite
Limestone - Flaggy
Marble
Rhyolite
Sandstone
Serpentinite
Shale/Schist/Phyllite
Slate