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Picrite Rock



Definition

Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine

History

Origin
Hawaii Islands

Discoverer
Unknown

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

Class
Igneous Rocks

Sub-Class
Durable Rock, Hard Rock

Family

Group
Volcanic

Other Categories
Fine Grained Rock, Opaque Rock

Texture

Texture
Earthy, Rough

Color
Black, Brown, Green, Grey, Pink, White, Yellow

Maintenance
Less

Durability
Durable

Water Resistant
Yes

Scratch Resistant
Yes

Stain Resistant
Yes

Wind Resistant
Yes

Acid Resistant
Yes

Appearance
Rough and Shiny

Uses

Architecture

Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration

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

Other Architectural Uses
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.

Medical Industry
-

Antiquity Uses
Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)

Types

Types
Oceanite

Features
Host Rock for Lead

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
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.

Composition

Mineral Content
Biotite, Olivine, Plagioclase, Pyrrhotite

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

Transformation

Metamorphism
Yes

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering
Yes

Types of Weathering
Biological Weathering

Erosion
Yes

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

Properties

Physical Properties

Hardness
6.8

Grain Size
Fine Grained

Fracture
Uneven

Streak
White, Greenish White or Grey

Porosity
Less Porous

Luster
Subvitreous to Dull

Compressive Strength
189.00 N/mm2 16

Cleavage
-

Toughness
2.1

Specific Gravity
2.75-2.92

Transparency
Opaque

Density
1.5-2.5 g/cm3

Thermal Properties

Specific Heat Capacity
0.88 kJ/Kg K 13

Resistance
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia
India, Russia

Africa
South Africa

Europe
Iceland

Others
-

Deposits in Western Continents

North America
Canada, USA

South America
Brazil

Deposits in Oceania Continent

Australia
-

Definition >>
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Igneous Rocks

Information about Picrite

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Picrite Uses. We have provided you with all information about Picrite rock here. Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. Picrite is available in black, brown, green, grey, pink, white, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Picrite is white, greenish white or grey. Get to know more about Picrite rock and characteristics of Picrite rock in the next sections.

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