Blueschist

Jaspillite

Blueschist and Jaspillite

Blueschist

Jaspillite

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Definition

Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks

History

Origin

USA

Western Australia, Minnesota

Discoverer

Edgar Bailey

Unknown

Etymology

From French schiste, Greek skhistos i.e. split

From Jaspilite (Mineral), a compact siliceous rock which resembles jasper

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Foliated

Banded, Trellis

Color

Blue, Bluish - Grey, Purple, Shades of Blue

Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Banded and Glassy

Uses

Architecture

Interior Uses

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Decorative Aggregates, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

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

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones

Creating Artwork, Jewelry

Types

Metamorphic rock

Algoma-type , Lake Superior-type and Superior-type

Features

Has High structural resistance against erosion and climate, Very fine grained rock

Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.

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

Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz

Coesite, Quartz, Sand

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Fe, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

3.5-43

1 7

👆🏻

Grain Size

Fine to Medium Grained

Large and Coarse Grained

Fracture

Conchoidal

Streak

White to Grey

White

Porosity

Highly Porous

Very Less Porous

Luster

Dull

Earthy

Compressive Strength

220.00 N/mm²230.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

1.5

Specific Gravity

3-3.25.0-5.3

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

2.8-2.9 g/cm³0-5.7 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Russia

Africa

Egypt, Ethiopia, South Africa

Europe

France, Greece, Iceland

Ukraine

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Brazil

Deposits in Oceania Continent

Australia

New Zealand

Western Australia

All about Blueschist and Jaspillite Properties

Know all about Blueschist and Jaspillite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Jaspillite belongs to Sedimentary Rocks.Texture of Blueschist is Foliated whereas that of Jaspillite is Banded, Trellis. Blueschist appears Dull and Banded and Jaspillite appears Banded and Glassy. The luster of Blueschist is dull while that of Jaspillite is earthy. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Jaspillite is available in red, reddish brown colors. The commercial uses of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones and that of Jaspillite are creating artwork, jewelry.