Definition
Origin
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Water Resistant
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Stain Resistant
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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
Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite
Durable Rock, Medium Hardness Rock
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Black, Brown, Light to Dark Grey
Decorative Aggregates, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Kitchens
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
Creating Artwork, Sea Defence
Has High structural resistance against erosion and climate, Very fine grained rock
Easter Island in the Polynesian Triangle, Pacific Ocean
Hawaiite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes and reach the Earth's surface.
Olivine, Plagioclase, Pyroxene
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Heat Resistant, Pressure Resistant, Wear Resistant