1 Definition
2.2 Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Appinite is an igneous rock in which the crystals are so fine grained that individual minerals cannot be easily distinguished
2.3 History
2.3.1 Origin
2.4.2 Discoverer
2.5 Etymology
From Greek pikros bitter + -ite, 19th century
From the variety of Lamprophyre Greek lampros bright and shining + porphureos purple
2.7 Class
Igneous Rocks
Igneous Rocks
2.7.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
2.8 Family
2.8.1 Group
2.9 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock
3 Texture
3.1 Texture
Earthy, Rough
Porphyritic
3.2 Color
Black, Brown, Colourless, Green, Grey, Pink, White, Yellow
Black, Bluish - Grey, Brown, Dark Greenish - Grey, Green, Grey
3.3 Maintenance
3.4 Durability
4.0.1 Water Resistant
4.1.2 Scratch Resistant
4.1.3 Stain Resistant
4.1.4 Wind Resistant
4.1.5 Acid Resistant
4.2 Appearance
Rough and Shiny
Dull, Banded and Foilated
5 Uses
5.1 Architecture
5.1.1 Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
5.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
Paving Stone, Garden Decoration, Office Buildings
5.1.3 Other Architectural Uses
5.2 Industry
5.2.1 Construction Industry
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.
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
5.2.2 Medical Industry
Not Yet Used
Taken as a Supplement for Calcium or Magnesium
5.3 Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Monuments, Sculpture, Small Figurines
5.4 Other Uses
5.4.1 Commercial Uses
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner
6 Types
6.1 Types
6.2 Features
Host Rock for Lead
Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny
6.3 Archaeological Significance
6.3.1 Monuments
6.3.2 Famous Monuments
Data Not Available
Data Not Available
6.3.3 Sculpture
6.3.4 Famous Sculptures
Data Not Available
Data Not Available
6.3.5 Pictographs
6.3.6 Petroglyphs
6.3.7 Figurines
6.4 Fossils
7 Formation
7.1 Formation
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.
The formation of Appinite takes place deep beneath the Earth’s surface at around 150 to 450 kms, and are erupted rapidly and violently.
7.2 Composition
7.2.1 Mineral Content
Biotite, Olivine, Plagioclase, Pyrrhotite
Amphibole, Carbonate, Garnet, Micas, Olivine, Phlogopite, Pyroxene
7.2.2 Compound Content
Al, CaO, Carbon Dioxide, Mg, MgO
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
7.3 Transformation
7.3.1 Metamorphism
7.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism
7.3.3 Weathering
7.3.4 Types of Weathering
Biological Weathering
Chemical Weathering, Mechanical Weathering
7.3.5 Erosion
7.3.6 Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Water Erosion, Wind Erosion
8 Properties
8.1 Physical Properties
8.1.1 Hardness
8.1.8 Grain Size
Fine Grained
Fine to Coarse Grained
8.1.9 Fracture
8.1.10 Streak
White, Greenish White or Grey
White
8.1.11 Porosity
Less Porous
Very Less Porous
8.1.12 Luster
Subvitreous to Dull
Subvitreous to Dull
8.1.13 Compressive Strength
8.1.17 Cleavage
8.1.18 Toughness
8.1.19 Specific Gravity
8.1.22 Transparency
Opaque
Translucent to Opaque
8.1.23 Density
1.5-2.5 g/cm32.95-2.96 g/cm3
0
1400
8.3 Thermal Properties
8.3.1 Specific Heat Capacity
9.3.2 Resistance
Heat Resistant
Heat Resistant, Impact Resistant
10 Reserves
10.1 Deposits in Eastern Continents
10.1.1 Asia
10.1.2 Africa
South Africa
Angola, Botswana, Cameroon, Ethiopia, South Africa
10.1.3 Europe
Iceland
England, Hungary, Iceland, United Kingdom
10.1.4 Others
Not Yet Found
Antarctica, Greenland
10.2 Deposits in Western Continents
10.2.1 North America
Canada, USA
Canada, Mexico, USA
10.2.2 South America
Brazil
Argentina, Colombia, Ecuador
10.3 Deposits in Oceania Continent
10.3.1 Australia
Not Yet Found
New South Wales, New Zealand, Queensland, South Australia, Western Australia