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Boninite and Novaculite


Novaculite and Boninite


Definition

Definition
Boninite is a mafic extrusive rock which is high in magnesium and silica content, formed in fore-arc environments, typically during the early stages of subduction   
Novaculite is a dense, hard, fine-grained, siliceous metamorpic rock which is a type of chert that breaks with conchoidal fracture   

History
  
  

Origin
Japan   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From its occurrence in the Izu-Bonin arc south of Japan   
From Latin word novacula, for razor stone   

Class
Igneous Rocks   
Sedimentary Rocks   

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

Family
  
  

Group
Volcanic   
Not Applicable   

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

Texture

Texture
Aphanitic to Porphyritic   
Banded, Glassy, Rough, Vitreous   

Color
Bluish - Grey, Brown, Colourless, Green, Grey   
Black, Brown, Green, Grey, Red, White   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
Yes   

Acid Resistant
No   
Yes   

Appearance
Dull and Soft   
Glassy or Pearly   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Kitchens   
Countertops, Decorative Aggregates, Flooring, Interior Decoration   

Exterior Uses
Garden Decoration, Office Buildings   
As Building Stone, Garden Decoration   

Other Architectural Uses
Not Yet Used   
Curbing   

Industry
  
  

Construction Industry
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   
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
An Oil and Gas Reservoir, Cemetery Markers, Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)   
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
Not Available   
Not Available   

Features
Available in Lots of Colors and Patterns, High Mg content, 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
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Not Yet Used   
Not Yet Used   

Fossils
Absent   
Present   

Formation

Formation
Boninite is a type of Igneous rock which is formed through the cooling and solidification of lava or existing rocks.   
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, Ilmenite   
Quartz, Silicon   

Compound Content
Silicon Dioxide   
Ca, Silicon Dioxide   

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism   
Not Applicable   

Weathering
Yes   
No   

Types of Weathering
Biological Weathering   
Not Applicable   

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
7   
7   

Grain Size
Fine Grained   
Fine Grained   

Fracture
Uneven   
Conchoidal   

Streak
White   
Colorless   

Porosity
Less Porous   
Less Porous   

Luster
Vitreous   
Waxy and Dull   

Compressive Strength
Not Available   
450.00 N/mm2   
1

Cleavage
Not Available   
Non-Existent   

Toughness
1.1   
1.5   

Specific Gravity
2.5-2.8   
2.5-2.7   

Transparency
Opaque   
Translucent to Opaque   

Density
Not Available   
2.7 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
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 Available   
China, India, Iran, Japan, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam   

Africa
South Africa   
Kenya, Morocco, South Africa, Tanzania   

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

Others
Antarctica, Greenland   
Greenland, Mid-Atlantic Ridge   

Deposits in Western Continents
  
  

North America
USA   
Canada, Mexico, USA   

South America
Colombia, Uruguay   
Bolivia, Brazil   

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Boninite and Novaculite Properties

Know all about Boninite and Novaculite properties here. All properties of rocks are important as they define the type of rock and its application. Boninite belongs to Igneous Rocks while Novaculite belongs to Sedimentary Rocks.Texture of Boninite is Aphanitic to Porphyritic whereas that of Novaculite is Banded, Glassy, Rough, Vitreous. Boninite appears Dull and Soft and Novaculite appears Glassy or Pearly. The luster of Boninite is vitreous while that of Novaculite is waxy and dull. Boninite is available in bluish - grey, brown, colourless, green, grey colors whereas Novaculite is available in black, brown, green, grey, red, white colors. The commercial uses of Boninite are an oil and gas reservoir, cemetery markers, creating artwork, soil conditioner, source of magnesia (mgo) and that of Novaculite are 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.

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