Hornfels and Jadeitite
Definition
Definition
Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock
Jadeitite is a metamorphic rock usually found in blueschist grade metamorphic terrains
History
Origin
New Zealand
Unknown
Discoverer
Unknown
Unknown
Etymology
From German which means hornstone
From pyroxene mineral jadeite
Class
Metamorphic Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
Not Applicable
Not Applicable
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Texture
Granular, Platy
Earthy
Color
Brown, Dark Greenish - Grey, Green, Reddish Brown
Black, Brown, Colourless, Green, Grey, White
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
Yes
Yes
Scratch Resistant
No
No
Stain Resistant
No
No
Wind Resistant
No
No
Acid Resistant
No
No
Appearance
Dull
Rough and Dull
Uses
Architecture
Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Garden Decoration, Office Buildings, Paving Stone
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
for Road Aggregate, Roadstone
As Dimension Stone, Cutting Tool, Knives
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Monuments
Artifacts, Jewellery, Monuments, Sculpture
Other Uses
Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork
Commemorative Tablets, Creating Artwork, Jewelry
Types
Types
Biotite hornfels
Not Available
Features
Smooth to touch
Host Rock for Lead
Archaeological Significance
Monuments
Used
Used
Famous Monuments
Data Not Available
Data Not Available
Sculpture
Not Yet Used
Used
Famous Sculptures
Not Applicable
Data Not Available
Pictographs
Used
Used
Petroglyphs
Used
Used
Figurines
Not Yet Used
Used
Fossils
Absent
Absent
Formation
Formation
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Jadeitite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Composition
Mineral Content
Andalusite
Carbonate, Magnetite, Pyrrhotite, Serpentine, Sulfides
Compound Content
Fe, Mg
Ca, CaO, Carbon Dioxide, KCl, MgO, Sulfur Dioxide, Sulphur
Transformation
Metamorphism
No
Yes
Types of Metamorphism
Not Applicable
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Weathering
Yes
No
Types of Weathering
Biological Weathering
Not Applicable
Erosion
Yes
Yes
Types of Erosion
Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Coastal Erosion, Water Erosion, Wind Erosion
Properties
Physical Properties
Hardness
2-3
3-5
Grain Size
Fine Grained
Very fine-grained
Fracture
Conchoidal
Uneven
Streak
Unknown
White, Greenish White or Grey
Porosity
Highly Porous
Less Porous
Luster
Shiny
Waxy and Dull
Compressive Strength
5.80 N/mm2
31
310.00 N/mm2
2
Cleavage
Perfect
Irregular
Toughness
Not Yet Found
7
Specific Gravity
3.4-3.9
2.79-3
Transparency
Opaque
Opaque
Density
0.25-0.30 g/cm3
2.5-3 g/cm3
Thermal Properties
Specific Heat Capacity
0.84 kJ/Kg K
15
0.95 kJ/Kg K
9
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Heat Resistant, Water Resistant
Reserves
Deposits in Eastern Continents
Asia
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand
India, Saudi Arabia, Singapore, South Korea
Africa
Cameroon, East Africa, Tanzania, Western Africa
Ethiopia, Western Africa
Europe
United Kingdom
England, Georgia, Switzerland, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, USA
Canada
South America
Bolivia, Brazil, Colombia, Ecuador
Colombia
Deposits in Oceania Continent
Australia
New South Wales, New Zealand, Queensland, Western Australia
Central Australia, New South Wales, New Zealand, Western Australia
All about Hornfels and Jadeitite Properties
Know all about Hornfels and Jadeitite properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels and Jadeitite belong to Metamorphic Rocks.Texture of Hornfels is Granular, Platy whereas that of Jadeitite is Earthy. Hornfels appears Dull and Jadeitite appears Rough and Dull. The luster of Hornfels is shiny while that of Jadeitite is waxy and dull. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Jadeitite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Hornfels are cemetery markers, commemorative tablets, creating artwork and that of Jadeitite are commemorative tablets, creating artwork, jewelry.
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