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Dacite vs Novaculite


Novaculite vs Dacite


Definition

Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite   
Novaculite is a dense, hard, fine-grained, siliceous metamorpic rock which is a type of chert that breaks with conchoidal fracture   

History
  
  

Origin
Romania and Moldova, Europe   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described   
From Latin word novacula, for razor stone   

Class
Igneous Rocks   
Sedimentary Rocks   

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

Family
  
  

Group
Volcanic   
Not Applicable   

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

Texture

Texture
Aphanitic to Porphyritic   
Banded, Glassy, Rough, Vitreous   

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

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
Yes   

Appearance
Vesicular   
Glassy or Pearly   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Entryways, Interior Decoration   
Countertops, Decorative Aggregates, Flooring, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping   
Arrowheads, Building houses or walls, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives, Landscaping, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone, Spear Points, Used to sharpen metal tools and weapons   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Monuments   

Other Uses
  
  

Commercial Uses
Commemorative Tablets, Creating Artwork   
Cemetery Markers, Gemstone, In aquifers, In fire-starting tools, Jewelry, Manufacture of tools, Pebbles are used in ball mills to grind in ceramics industry, To determine the gold content of jewelry   

Types

Types
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite   
Not Available   

Features
Host Rock for Lead, Is one of the oldest rock   
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
Data Not Available   

Sculpture
Not Yet Used   
Not Yet Used   

Famous Sculptures
Not Applicable   
Not Applicable   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Not Yet Used   
Not Yet Used   

Fossils
Absent   
Present   

Formation

Formation
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.   
Novaculite forms when microcrystals of silicon dioxide grow within soft sediments that become limestone or chalk. The formation of Novaculite can be either of chemical or biological origin.   

Composition
  
  

Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon   
Quartz, Silicon   

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

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism   
Not Applicable   

Weathering
Yes   
No   

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

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion   
Chemical Erosion, Coastal Erosion, Glacier Erosion   

Properties

Physical Properties
  
  

Hardness
2-2.25   
7   

Grain Size
Medium to Fine Coarse Grained   
Fine Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
Colorless   

Porosity
Less Porous   
Less Porous   

Luster
Subvitreous to Dull   
Waxy and Dull   

Compressive Strength
Not Available   
450.00 N/mm2   
1

Cleavage
Perfect   
Non-Existent   

Toughness
Not Available   
1.5   

Specific Gravity
2.86-2.87   
2.5-2.7   

Transparency
Translucent   
Translucent to Opaque   

Density
2.77-2.771 g/cm3   
2.7 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
0.74 kJ/Kg K   
19

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Not Yet Found   
China, India, Iran, Japan, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam   

Africa
Not Yet Found   
Kenya, Morocco, South Africa, Tanzania   

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

Others
Not Yet Found   
Greenland, Mid-Atlantic Ridge   

Deposits in Western Continents
  
  

North America
USA   
Canada, Mexico, USA   

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

Deposits in Oceania Continent
  
  

Australia
New Zealand, South Australia, Western Australia   
New South Wales, Queensland, South Australia, Western Australia   

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Dacite vs Novaculite 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 Dacite and Novaculite Reserves. Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. Novaculite is a dense, hard, fine-grained, siliceous metamorpic rock which is a type of chert that breaks with conchoidal fracture. 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 Dacite vs Novaculite information and Dacite vs Novaculite characteristics in the upcoming sections.

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Dacite vs Novaculite 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. Dacite vs Novaculite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Dacite and Properties of Novaculite. Learn more about Dacite vs Novaculite in the next section. The interior uses of Dacite include Decorative aggregates, Entryways and Interior decoration whereas the interior uses of Novaculite include Countertops, Decorative aggregates, Flooring and Interior decoration. Due to some exceptional properties of Dacite and Novaculite, they have various applications in construction industry. The uses of Dacite in construction industry include As dimension stone, Construction aggregate, For road aggregate, Landscaping and that of Novaculite include Arrowheads, Building houses or walls, Cement manufacture, Construction aggregate, Cutting tool, For road aggregate, Knives, Landscaping, Making natural cement, Production of glass and ceramics, Rail track ballast, Roadstone, Spear points, Used to sharpen metal tools and weapons.

More about Dacite and Novaculite

Here you can know more about Dacite and Novaculite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Dacite and Novaculite consists of mineral content and compound content. The mineral content of Dacite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon and mineral content of Novaculite includes Quartz, Silicon. You can also check out the list of all Igneous Rocks. When we have to compare Dacite vs Novaculite, the texture, color and appearance plays an important role in determining the type of rock. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas, Novaculite is available in black, brown, green, grey, red, white colors. Appearance of Dacite is Vesicular and that of Novaculite is Glassy or Pearly. Properties of rock is another aspect for Dacite vs Novaculite. The hardness of Dacite is 2-2.25 and that of Novaculite is 7. The types of Dacite are Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite whereas types of Novaculite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Dacite is white while that of Novaculite is colorless. The specific heat capacity of Dacite is 0.92 kJ/Kg K and that of Novaculite is 0.74 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Dacite is heat resistant, impact resistant, pressure resistant, wear resistant whereas Novaculite is heat resistant, impact resistant, pressure resistant, wear resistant.

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