Definition
Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix
  
Talc carbonate is nothing but a rock sequence or a mineral composition found in metamorphic ultramafic rocks.
  
History
  
  
Origin
Scotland
  
China, USA, Middle east
  
Discoverer
Unknown
  
Unknown
  
Etymology
From Alkalic Igneous complex near Loch Borralan in northwest Scotland
  
From medieval Latin, talcum
  
Class
Igneous Rocks
  
Metamorphic Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Soft Rock
  
Family
  
  
Group
Plutonic
  
Not Applicable
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Granular
  
Very Soft
  
Color
Brown, Buff, Cream, Green, Grey, Pink, White
  
Colourless, Grey, White
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
No
  
Yes
  
Stain Resistant
No
  
No
  
Wind Resistant
Yes
  
No
  
Acid Resistant
Yes
  
No
  
Appearance
Banded and Foilated
  
Soft
  
Architecture
  
  
Interior Uses
Countertops, Decorative Aggregates, Flooring, Homes, Interior Decoration
  
Decorative Aggregates, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
  
Garden Decoration
  
Other Architectural Uses
Curbing
  
Powder
  
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
  
Source of calcium
  
Medical Industry
Not Yet Used
  
Taken as a Supplement for Calcium or Magnesium
  
Antiquity Uses
Artifacts
  
Artifacts, Jewellery, Monuments, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Cemetery Markers
  
Manufacturing of baby powder
  
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
  
Easily splits into thin plates, Generally rough to touch, Host Rock for Lead
  
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
  
Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Used
  
Used
  
Fossils
Absent
  
Absent
  
Formation
Borolanites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.
  
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Talc Carbonate is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
  
Composition
  
  
Mineral Content
Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite
  
Carbonate, Chlorite, Magnesium
  
Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
  
CaO, Carbon Dioxide, MgO
  
Transformation
  
  
Metamorphism
Yes
  
Yes
  
Types of Metamorphism
Regional Metamorphism
  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism
  
Weathering
Yes
  
No
  
Types of Weathering
Chemical Weathering, Mechanical Weathering
  
Not Applicable
  
Erosion
Yes
  
No
  
Types of Erosion
Wind Erosion
  
Not Applicable
  
Physical Properties
  
  
Hardness
5.5-6
  
1-2
  
Grain Size
Fine Grained
  
Fine Grained
  
Fracture
Conchoidal to Uneven
  
Flat
  
Streak
White
  
White
  
Porosity
Less Porous
  
Less Porous
  
Luster
Greasy to Dull
  
Pearly
  
Compressive Strength
150.00 N/mm2
  
14
250.00 N/mm2
  
4
Cleavage
Poor
  
Perfect
  
Toughness
Not Available
  
1
  
Specific Gravity
2.6
  
2.86
  
Transparency
Translucent to Opaque
  
Translucent
  
Density
2.6 g/cm3
  
2.8-2.9 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
Not Available
  
0.92 kJ/Kg K
  
10
Resistance
Heat Resistant, Impact Resistant, Wear Resistant
  
Heat Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam
  
Not Yet Found
  
Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
  
Ethiopia, Ghana, Western Africa
  
Europe
Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden
  
England
  
Others
Greenland
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, USA
  
Canada, USA
  
South America
Brazil, Chile, Colombia, Uruguay, Venezuela
  
Argentina, Bolivia, Uruguay
  
Deposits in Oceania Continent
  
  
Australia
New Zealand, Queensland, South Australia, Tasmania, Western Australia
  
Central Australia, South Australia, Western Australia