Home
Compare Rocks


Picrite and Phyllite


Phyllite and Picrite


Definition

Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine   
Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks   

History
  
  

Origin
Hawaii Islands   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From Greek pikros bitter + -ite, 19th century   
From Greek phullon leaf + -ite1   

Class
Igneous Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Hard Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Volcanic   
Not Applicable   

Other Categories
Fine Grained Rock, Opaque Rock   
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Earthy, Rough   
Phyllitic Sheen, Slaty   

Color
Black, Brown, Colourless, Green, Grey, Pink, White, Yellow   
Black to Grey, Light Greenish Grey   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
Yes   
No   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
No   

Appearance
Rough and Shiny   
Crinkled or Wavy   

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration   
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration   

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone   
As Building Stone, As Facing Stone, Garden Decoration   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

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, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts, Sculpture   

Other Uses
  
  

Commercial Uses
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)   
Cemetery Markers, Commemorative Tablets, Creating Artwork, Writing Slates   

Types

Types
Oceanite   
Not Available   

Features
Host Rock for Lead   
Easily splits into thin plates, Is one of the oldest rock, Surfaces are often shiny   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

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.   
Phyllite is a metamorphic rock which is formed by regional metamorphism of argillaceous sediments since their cleavage arose due to deviatoric stress.   

Composition
  
  

Mineral Content
Biotite, Olivine, Plagioclase, Pyrrhotite   
Albite, Alusite, Amphibole, Apatite, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc, Zircon   

Compound Content
Al, CaO, Carbon Dioxide, Mg, MgO   
CaO, Carbon Dioxide, MgO   

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism   
Not Applicable   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion   
Chemical Erosion, Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
6.8   
1-2   

Grain Size
Fine Grained   
Medium to Fine Coarse Grained   

Fracture
Uneven   
Conchoidal   

Streak
White, Greenish White or Grey   
White   

Porosity
Less Porous   
Highly Porous   

Luster
Subvitreous to Dull   
Phyllitic   

Compressive Strength
189.00 N/mm2   
11
Not Available   

Cleavage
Imperfect   
Crenulation and Pervasive   

Toughness
2.1   
1.2   

Specific Gravity
2.75-2.92   
2.72-2.73   

Transparency
Opaque   
Opaque   

Density
1.5-2.5 g/cm3   
2.18-3.3 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.88 kJ/Kg K   
13
Not Available   

Resistance
Heat Resistant   
Heat Resistant, Pressure Resistant, Water Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam   

Africa
South Africa   
Egypt, Ethiopia, Morocco, Nigeria, South Africa   

Europe
Iceland   
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, Costa Rica, Cuba, Mexico, Panama, USA   

South America
Brazil   
Brazil, Colombia, Guyana   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New South Wales, New Zealand, Queensland   

Summary >>
<< Reserves

All about Picrite and Phyllite Properties

Know all about Picrite and Phyllite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Phyllite belongs to Metamorphic Rocks.Texture of Picrite is Earthy, Rough whereas that of Phyllite is Phyllitic Sheen, Slaty. Picrite appears Rough and Shiny and Phyllite appears Crinkled or Wavy. The luster of Picrite is subvitreous to dull while that of Phyllite is phyllitic. Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors whereas Phyllite is available in black to grey, light greenish grey colors. The commercial uses of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo) and that of Phyllite are cemetery markers, commemorative tablets, creating artwork, writing slates.

Compare Igneous Rocks

Igneous Rocks

Igneous Rocks

» More Igneous Rocks

Compare Igneous Rocks

» More Compare Igneous Rocks