Definition
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Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
from French néphéline, from Greek nephelē
Fine Grained Rock, Opaque Rock
Black, Brown, Green, Grey, White
Decorative Aggregates, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
Artifacts, Monuments, Sculpture, Small Figurines
Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
Nephelinite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
Clinopyroxene, Nepheline, Plagioclase
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Water Erosion, Wind Erosion
Talc carbonate is nothing but a rock sequence or a mineral composition found in metamorphic ultramafic rocks.
From medieval Latin, talcum
Fine Grained Rock, Opaque Rock
Decorative Aggregates, Interior Decoration
Taken as a Supplement for Calcium or Magnesium
Artifacts, Jewellery, Monuments, Sculpture, Small Figurines
Manufacturing of baby powder
Easily splits into thin plates, Generally rough to touch, Host Rock for Lead
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Talc Carbonate is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Carbonate, Chlorite, Magnesium
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism
Heat Resistant, Wear Resistant
Ethiopia, Ghana, Western Africa
Argentina, Bolivia, Uruguay
Central Australia, South Australia, Western Australia