Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Origin
Hawaii Islands
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
From Greek pikros bitter + -ite, 19th century
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Earthy, Rough
Banded, Trellis
Color
Black, Brown, Green, Grey, Pink, White, Yellow
Red, Reddish Brown
Durability
Durable
Durable
Appearance
Rough and Shiny
Banded and Glassy
Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
As Facing Stone, Garden Decoration, Paving Stone
Other Architectural Uses
Curbing
Curbing
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 a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Jewellery, Monuments
Commercial Uses
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)
Creating Artwork, Jewelry
Types
Oceanite
Algoma-type , Lake Superior-type and Superior-type
Features
Host Rock for Lead
Is one of the oldest rock
Archaeological Significance
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.
Jaspillite is a type of sedimentary rock which is formed by the compaction and sedimentation of pieces of broken or weathered rocks and minerals.
Mineral Content
Biotite, Olivine, Plagioclase, Pyrrhotite
Coesite, Quartz, Sand
Compound Content
Al, CaO, Carbon Dioxide, Mg, MgO
Fe, Iron(III) Oxide, Silicon Dioxide
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism
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Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion
Grain Size
Fine Grained
Large and Coarse Grained
Fracture
Uneven
Conchoidal
Streak
White, Greenish White or Grey
White
Porosity
Less Porous
Very Less Porous
Luster
Subvitreous to Dull
Earthy
Specific Gravity
2.75-2.92
5.0-5.3
Transparency
Opaque
Translucent to Opaque
Density
1.5-2.5 g/cm3
0-5.7 g/cm3
Resistance
Heat Resistant
Heat Resistant, Impact Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
India, Russia
Russia
Deposits in Western Continents
North America
Canada, USA
Canada, USA
South America
Brazil
Brazil
Deposits in Oceania Continent
Australia
-
Western Australia
All about Picrite and Jaspillite Properties
Know all about Picrite and Jaspillite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Jaspillite belongs to Sedimentary Rocks.Texture of Picrite is Earthy, Rough whereas that of Jaspillite is Banded, Trellis. Picrite appears Rough and Shiny and Jaspillite appears Banded and Glassy. The luster of Picrite is subvitreous to dull while that of Jaspillite is earthy. Picrite is available in black, brown, green, grey, pink, white, yellow colors whereas Jaspillite is available in red, reddish brown 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 Jaspillite are creating artwork, jewelry.