Definition
Origin
Discoverer
Etymology
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Texture
Color
Maintenance
Durability
Water Resistant
Scratch Resistant
Stain Resistant
Wind Resistant
Acid Resistant
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Interior Uses
Exterior Uses
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Monuments
Famous Monuments
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Famous Sculptures
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Formation
Mineral Content
Compound Content
Metamorphism
Types of Metamorphism
Weathering
Types of Weathering
Erosion
Types of Erosion
Hardness
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Asia
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Australia
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
From Greek pikros bitter + -ite, 19th century
Fine Grained Rock, Opaque Rock
Black, Brown, Green, Grey, Pink, White, Yellow
Countertops, Decorative Aggregates, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.
Artifacts, Monuments, Sculpture
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)
Picrite 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.
Biotite, Olivine, Plagioclase, Pyrrhotite
Al, CaO, Carbon Dioxide, Mg, MgO
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
White, Greenish White or Grey
Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites
Fine Grained Rock, Opaque Rock
Black, Brown, Green, Grey, Red, Rust, White
Decorative Aggregates, Interior Decoration
Garden Decoration, Paving Stone
Artifacts, Monuments, Sculpture
Creating Artwork, Gemstone, Jewelry
Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny
Porphyry is formed in two stages: the magma cools slowly deep within the crust or the magma is cools rapidly as it erupts from a volcano, creating small grains that are usually invisible to naked eye.
Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion
Heat Resistant, Impact Resistant
China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam
Egypt, Ethiopia, Ghana, South Africa
Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland
Canada, Cuba, Jamaica, USA
Bolivia, Brazil, Colombia, Ecuador, Paraguay
New South Wales, New Zealand, Western Australia