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Pumice
Pumice

Dacite
Dacite



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Pumice
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Dacite

Pumice vs Dacite

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Definition

Definition

Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

History

Origin

Spain
Romania and Moldova, Europe

Discoverer

Unknown
Unknown

Etymology

From Old French pomis, from a Latin dialect variant of pumex
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock

Family

Group

Volcanic
Volcanic

Other Categories

Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Texture

Vesicular
Aphanitic to Porphyritic

Color

Beige, Grey, Light Green, Light Grey, Pink, White, Yellow- grey
Bluish - Grey, Brown, Grey, Light to Dark Grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Vesicular
Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

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

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, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

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

Antiquity Uses

Artifacts
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
Commemorative Tablets, Creating Artwork

Types

Types

Scoria
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Features

Host Rock for Lead
Host Rock for Lead, Is one of the oldest rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

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.
Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Further, the Oceanic crust is hydrothermally altered as quartz and sodium are added.

Composition

Mineral Content

Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Impact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

62-2.25
1 7
👆🏻

Grain Size

Fine Grained
Medium to Fine Coarse Grained

Fracture

Planar
Conchoidal

Streak

White, Greenish White or Grey
White

Porosity

Highly Porous
Less Porous

Luster

Earthy
Subvitreous to Dull

Compressive Strength

51.20 N/mm270.00 N/mm2
0.15 450
👆🏻

Cleavage

Perfect
Perfect

Toughness

3
-

Specific Gravity

2.862.86-2.87
0 8.4
👆🏻

Transparency

Opaque
Translucent

Density

0.25-0.3 g/cm32.77-2.771 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.87 kJ/Kg K0.92 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
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Africa

Ethiopia, Kenya, Tanzania
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Europe

Greece, Hungary, Iceland, Italy, Turkey
France, Greece, Romania, Scotland, Spain

Others

-
-

Deposits in Western Continents

North America

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

South America

Argentina, Chile, Ecuador, Peru
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Western Australia
New Zealand, South Australia, Western Australia

Pumice vs Dacite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Pumice and Dacite Reserves. Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Pumice vs Dacite information and Pumice vs Dacite characteristics in the upcoming sections.

Pumice vs Dacite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Pumice vs Dacite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Pumice and Properties of Dacite. Learn more about Pumice vs Dacite in the next section. The interior uses of Pumice include Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Dacite include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Pumice and Dacite, they have various applications in construction industry. The uses of Pumice in construction industry include As dimension stone, Cement manufacture, For road aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks and that of Dacite include As dimension stone, Construction aggregate, For road aggregate, Landscaping.

More about Pumice and Dacite

Here you can know more about Pumice and Dacite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Pumice and Dacite consists of mineral content and compound content. The mineral content of Pumice includes Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica and mineral content of Dacite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Pumice vs Dacite, the texture, color and appearance plays an important role in determining the type of rock. Pumice is available in beige, grey, light green, light grey, pink, white, yellow- grey colors whereas, Dacite is available in bluish - grey, brown, grey, light to dark grey colors. Appearance of Pumice is Vesicular and that of Dacite is Vesicular. Properties of rock is another aspect for Pumice vs Dacite. The hardness of Pumice is 6 and that of Dacite is 2-2.25. The types of Pumice are Scoria whereas types of Dacite are Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Pumice and Dacite is white, greenish white or grey. The specific heat capacity of Pumice is 0.87 kJ/Kg K and that of Dacite is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Pumice is impact resistant, pressure resistant whereas Dacite is heat resistant, impact resistant, pressure resistant, wear resistant.