Definition
Kenyte is a variety of porphyritic phonolite or trachyte rock with rhomb shaped phenocrysts of anorthoclase with variable olivine and augite in a glassy matrix
  
Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone
  
History
  
  
Origin
Mount Kenya
  
Unknown
  
Discoverer
J. W. Gregory
  
Unknown
  
Etymology
From the mountain ranges- Mount Kenya and is named by J. W. Gregory in 1900
  
From quartz + -ite
  
Class
Igneous Rocks
  
Metamorphic Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Not Applicable
  
Not Applicable
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Medium Grained Rock, Opaque Rock
  
Texture
Glassy, Granular
  
Foliated, Granular
  
Color
Brown, Buff, Cream, Green, Grey, Pink, White
  
Black, Blue, Brown, Green, Light Grey, Purple, White, Yellow
  
Maintenance
More
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
Yes
  
Yes
  
Stain Resistant
No
  
Yes
  
Wind Resistant
No
  
Yes
  
Acid Resistant
No
  
Yes
  
Appearance
Banded and Foilated
  
Lustrous
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Entryways, Homes, Interior Decoration, Kitchens
  
Countertops, Decorative Aggregates, Flooring, Homes
  
Exterior Uses
As Building Stone, Garden Decoration, Paving Stone
  
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
  
Other Architectural Uses
Curbing
  
Curbing
  
Industry
  
  
Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics
  
Arrowheads, As Dimension Stone, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Artifacts, Monuments, Sculpture
  
Artifacts, Jewellery, Monuments, Sculpture
  
Other Uses
  
  
Commercial Uses
Cemetery Markers, Creating Artwork
  
An Oil and Gas Reservoir, As armour rock for sea walls, Cemetery Markers, Commemorative Tablets, In aquifers, Laboratory bench tops, Petroleum reservoirs, Soil Conditioner, Source of Magnesia (MgO), Tombstones, Used in aquariums
  
Types
Not Available
  
Not Available
  
Features
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock
  
Generally rough to touch, Is one of the oldest rock
  
Archaeological Significance
  
  
Monuments
Used
  
Used
  
Famous Monuments
Data Not Available
  
Data Not Available
  
Sculpture
Used
  
Used
  
Famous Sculptures
Data Not Available
  
Data Not Available
  
Pictographs
Used
  
Not Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Used
  
Used
  
Fossils
Absent
  
Absent
  
Formation
Kenyte is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
  
Quartzite forms from sandstone and the mineral quartz being put under extreme heat and pressure.
  
Composition
  
  
Mineral Content
Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite
  
Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz
  
Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
  
Aluminium Oxide, CaO, Iron(III) Oxide, MgO, Sodium Oxide, Silicon Dioxide
  
Transformation
  
  
Metamorphism
Yes
  
Yes
  
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism
  
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering
  
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Coastal Erosion
  
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
  
Physical Properties
  
  
Hardness
5.5-6
  
6-7
  
Grain Size
Fine Grained
  
Medium Grained
  
Fracture
Conchoidal to Uneven
  
Uneven, Splintery or Conchoidal
  
Streak
White, Greenish White or Grey
  
White
  
Porosity
Highly Porous
  
Less Porous
  
Luster
Greasy to Dull
  
Vitreous
  
Compressive Strength
150.00 N/mm2
  
14
115.00 N/mm2
  
18
Cleavage
Poor
  
Indiscernible
  
Toughness
Not Available
  
1.9
  
Specific Gravity
2.6
  
2.6-2.8
  
Transparency
Translucent to Opaque
  
Transparent to Translucent
  
Density
2.6 g/cm3
  
2.32-2.42 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
Not Available
  
0.75 kJ/Kg K
  
18
Resistance
Heat Resistant, Impact Resistant, Wear Resistant
  
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam
  
China, India, Israel, Russia, South Korea, Thailand, Turkey
  
Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
  
Ethiopia, Morocco, South Africa, Zimbabwe
  
Europe
Andorra, Finland, France, Germany, Great Britain, Italy, Norway, Portugal, Spain, Sweden
  
England, Italy, Norway, Scotland, Sweden, United Kingdom
  
Others
Greenland
  
Greenland
  
Deposits in Western Continents
  
  
North America
Canada, USA
  
Bahamas, Canada, USA
  
South America
Brazil, Chile, Colombia, Uruguay, Venezuela
  
Brazil, Colombia, Venezuela
  
Deposits in Oceania Continent
  
  
Australia
New Zealand, Queensland, South Australia, Tasmania, Western Australia
  
New Zealand, Queensland, Western Australia