Pumice

Taconite

Pumice and Taconite

Pumice

Taconite

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Definition

Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals

Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica

History

Origin

Spain

Western Australia, Minnesota

Discoverer

Unknown

Newton Horace Winchell

Etymology

From Old French pomis, from a Latin dialect variant of pumex

From the name of Taconic Mountains in New England

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Vesicular

Banded, Trellis

Color

Beige, Grey, Light Green, Light Grey, Pink, White, Yellow- grey

Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Vesicular

Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing, Powder

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks

As Dimension Stone, Used for flooring, stair treads, borders and window sills.

Medical Industry

As an abrasive in skin exfoliating products, In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

As a traction material on snow-covered roads, As an abrasive in pencil erasers, Fine abrasive used for polishing, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Used in aquariums

As a touchstone, Cemetery Markers, Creating Artwork

Types

Scoria

Iron formation

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

Pumice rock forms when the magma cools so quickly that atoms in the melt are not able to arrange themselves into a crystalline structure.

Taconite is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. When the river reaches a lake or sea, its load of transported rocks settles or deposits at the bottom of sea or lake.

Composition

Mineral Content

Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica

Hematite, Magnetite, Quartz

Compound Content

Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide

Fe, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Impact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering, Mechanical Weathering

Erosion

✔ ✘

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

65.5-6

1 7

👆🏻

Grain Size

Fine Grained

Large and Coarse Grained

Fracture

Planar

Uneven, Splintery or Conchoidal

Streak

White, Greenish White or Grey

White

Porosity

Highly Porous

Luster

Earthy

Compressive Strength

51.20 N/mm²190.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

1.5

Specific Gravity

2.865-5.3

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

0.25-0.3 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.87 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Indonesia, Japan, Russia

China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam

Africa

Ethiopia, Kenya, Tanzania

Kenya, Morocco, South Africa, Tanzania

Europe

Greece, Hungary, Iceland, Italy, Turkey

Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom

Others

Greenland, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA

Canada, Mexico, USA

South America

Argentina, Chile, Ecuador, Peru

Bolivia, Brazil

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New South Wales, Queensland, South Australia, Western Australia

All about Pumice and Taconite Properties

Know all about Pumice and Taconite properties here. All properties of rocks are important as they define the type of rock and its application. Pumice belongs to Igneous Rocks while Taconite belongs to Sedimentary Rocks.Texture of Pumice is Vesicular whereas that of Taconite is Banded, Trellis. Pumice appears Vesicular and Taconite appears Layered, Banded, Veined and Shiny. The luster of Pumice and Taconite is earthy. Pumice is available in beige, grey, light green, light grey, pink, white, yellow- grey colors whereas Taconite is available in red, reddish brown colors. The commercial uses of Pumice are as a traction material on snow-covered roads, as an abrasive in pencil erasers, fine abrasive used for polishing, manufacture of soap, solvents, dyes, plastics and fibres, used in aquariums and that of Taconite are as a touchstone, cemetery markers, creating artwork.