Felsite and Jaspillite
Definition
Definition
Felsite is a very fine grained volcanic rock that may or may not contain larger crystals and light colored rock that typically requires petrographic examination or chemical analysis for more precise definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
Unknown
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
From English feldspar and -ite
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
Not Applicable
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Texture
Arborescent Patterned, Vitreous
Banded, Trellis
Color
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow
Red, Reddish Brown
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
Yes
No
Scratch Resistant
Yes
No
Stain Resistant
No
No
Wind Resistant
Yes
No
Acid Resistant
No
No
Appearance
Layered, Banded, Veined and Shiny
Banded and Glassy
Uses
Architecture
Interior Uses
Decorative Aggregates, Flooring, Interior Decoration
Decorative Aggregates, Interior Decoration
Exterior Uses
Paving Stone, Garden Decoration
As Facing Stone, Garden Decoration, Paving Stone
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points
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
Medical Industry
Surgery
Not Yet Used
Antiquity Uses
Artifacts
Artifacts, Jewellery, Monuments
Other Uses
Commercial Uses
Mirror, Jewelry
Creating Artwork, Jewelry
Types
Types
Not Available
Algoma-type , Lake Superior-type and Superior-type
Features
Available in Lots of Colors and Patterns, Clasts are smooth to touch, Splintery, Very fine grained rock
Is one of the oldest rock
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
Used
Petroglyphs
Used
Used
Figurines
Not Yet Used
Not Yet Used
Fossils
Absent
Present
Formation
Formation
Felsite 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.
Jaspillite is a type of sedimentary rock which is formed by the compaction and sedimentation of pieces of broken or weathered rocks and minerals.
Composition
Mineral Content
Feldspar, Iron Oxides
Coesite, Quartz, Sand
Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Fe, Iron(III) Oxide, Silicon Dioxide
Transformation
Metamorphism
Yes
No
Types of Metamorphism
Burial Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
Not Applicable
Weathering
Yes
Yes
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering
Erosion
Yes
Yes
Types of Erosion
Chemical Erosion, Glacier Erosion, Water Erosion
Chemical Erosion, Coastal Erosion
Properties
Physical Properties
Hardness
5-5.5
3
Grain Size
Fine Grained
Large and Coarse Grained
Fracture
Conchoidal
Conchoidal
Streak
White
White
Porosity
Very Less Porous
Very Less Porous
Luster
Vitreous
Earthy
Compressive Strength
0.15 N/mm2
33
230.00 N/mm2
6
Cleavage
Non-Existent
Imperfect
Toughness
Not Available
Not Available
Specific Gravity
2.6-2.7
5.0-5.3
Transparency
Translucent
Translucent to Opaque
Density
2.6 g/cm3
0-5.7 g/cm3
Thermal Properties
Specific Heat Capacity
0.92 kJ/Kg K
10
3.20 kJ/Kg K
1
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Impact Resistant, Wear Resistant
Reserves
Deposits in Eastern Continents
Asia
Afghanistan, Indonesia, Japan, Russia
Russia
Africa
Kenya
Not Yet Found
Europe
Greece, Hungary, Iceland, Italy, Turkey
Ukraine
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, Mexico, USA
Canada, USA
South America
Argentina, Chile, Ecuador, Peru
Brazil
Deposits in Oceania Continent
Australia
New Zealand
Western Australia
All about Felsite and Jaspillite Properties
Know all about Felsite and Jaspillite properties here. All properties of rocks are important as they define the type of rock and its application. Felsite belongs to Igneous Rocks while Jaspillite belongs to Sedimentary Rocks.Texture of Felsite is Arborescent Patterned, Vitreous whereas that of Jaspillite is Banded, Trellis. Felsite appears Layered, Banded, Veined and Shiny and Jaspillite appears Banded and Glassy. The luster of Felsite is vitreous while that of Jaspillite is earthy. Felsite is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Jaspillite is available in red, reddish brown colors. The commercial uses of Felsite are mirror, jewelry and that of Jaspillite are creating artwork, jewelry.
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