Picrite

Jaspillite

Picrite and Jaspillite

Picrite

Jaspillite

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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

History

Origin

Hawaii Islands

Western Australia, Minnesota

Discoverer

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

Family

Group

Volcanic

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

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Shiny

Banded and Glassy

Uses

Architecture

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

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 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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Jewellery, Monuments

Other Uses

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

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

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.

Composition

Mineral Content

Biotite, Olivine, Plagioclase, Pyrrhotite

Coesite, Quartz, Sand

Compound Content

Al, CaO, Carbon Dioxide, Mg, MgO

Fe, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

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

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

6.83

1 7

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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

Compressive Strength

189.00 N/mm²230.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.1

Specific Gravity

2.75-2.925.0-5.3

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

1.5-2.5 g/cm³0-5.7 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.88 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Russia

Africa

South Africa

Europe

Iceland

Ukraine

Others

Deposits in Western Continents

North America

Canada, USA

South America

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.