Home

Igneous Rocks + -

Fossil Rocks + -

Metamorphic Rocks + -

Durable Rocks + -

Medium Grained Rocks + -

Compare Rocks


Soapstone and Dacite


Dacite and Soapstone


Definition

Definition
It is a metamorphic magnesium rich rock because it is composed of the mineral talc   
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite   

History
  
  

Origin
USA   
Romania and Moldova, Europe   

Discoverer
Unknown   
Unknown   

Etymology
From 17th century, because of its greasy feel and use like a soap   
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described   

Class
Metamorphic Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Soft Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Not Applicable   
Volcanic   

Other Categories
Fine Grained Rock, Opaque Rock   
Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Polished   
Aphanitic to Porphyritic   

Color
Black, Black to Grey, Green, Grey   
Bluish - Grey, Brown, Grey, Light to Dark Grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
No   
No   

Stain Resistant
No   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Dull, Banded and Foilated   
Vesicular   

Uses

Architecture
  
  

Interior Uses
Bathrooms, Decorative Aggregates, Homes, Interior Decoration   
Decorative Aggregates, Entryways, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Manufacture of Magnesium and Dolomite Refractories   
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping   

Medical Industry
Taken as a Supplement for Calcium or Magnesium   
Not Yet Used   

Antiquity Uses
Artifacts, Jewellery, Monuments, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)   
Commemorative Tablets, Creating Artwork   

Types

Types
Not Available   
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
Used   
Not Yet Used   

Famous Monuments
Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire   
Not Applicable   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.   
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
Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz   
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon   

Compound Content
CaO, Mg, MgO   
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
No   
Yes   

Types of Weathering
Not Applicable   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
No   
Yes   

Types of Erosion
Not Applicable   
Chemical Erosion   

Properties

Physical Properties
  
  

Hardness
1   
2-2.25   

Grain Size
Fine Grained   
Medium to Fine Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Black   
White   

Porosity
Less Porous   
Less Porous   

Luster
Greasy   
Subvitreous to Dull   

Compressive Strength
225.00 N/mm2   
7
Not Available   

Cleavage
Perfect   
Perfect   

Toughness
1   
Not Available   

Specific Gravity
2.86   
2.86-2.87   

Transparency
Opaque   
Translucent   

Density
2.8-2.9 g/cm3   
2.77-2.771 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.88 kJ/Kg K   
13
0.92 kJ/Kg K   
10

Resistance
Heat Resistant, Pressure Resistant   
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand   
Not Yet Found   

Africa
Egypt, Ethiopia, Ghana, South Africa, Western Africa   
Not Yet Found   

Europe
Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom   
France, Greece, Romania, Scotland, Spain   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
USA   

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

Deposits in Oceania Continent
  
  

Australia
Central Australia, New Zealand, Queensland   
New Zealand, South Australia, Western Australia   

Summary >>
<< Reserves

All about Soapstone and Dacite Properties

Know all about Soapstone and Dacite properties here. All properties of rocks are important as they define the type of rock and its application. Soapstone belongs to Metamorphic Rocks while Dacite belongs to Igneous Rocks.Texture of Soapstone is Polished whereas that of Dacite is Aphanitic to Porphyritic. Soapstone appears Dull, Banded and Foilated and Dacite appears Vesicular. The luster of Soapstone is greasy while that of Dacite is subvitreous to dull. Soapstone is available in black, black to grey, green, grey colors whereas Dacite is available in bluish - grey, brown, grey, light to dark grey colors. The commercial uses of Soapstone are cemetery markers, creating artwork, gemstone, jewelry, manufacture of soap, solvents, dyes, plastics and fibres, production of lime, source of magnesia (mgo) and that of Dacite are commemorative tablets, creating artwork.

Compare Metamorphic Rocks

Metamorphic Rocks

Metamorphic Rocks

» More Metamorphic Rocks

Compare Metamorphic Rocks

» More Compare Metamorphic Rocks