Definition
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Origin
Iceland
Western Australia, Minnesota
Discoverer
Ian S. E. Carmichael
Unknown
Etymology
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Aphanitic to Porphyritic
Banded, Trellis
Color
Bluish - Grey, Grey, Pink, Yellow
Red, Reddish Brown
Durability
Durable
Durable
Appearance
Dull and Soft
Banded and Glassy
Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
Decorative Aggregates, Interior Decoration
Exterior Uses
Office Buildings, Roof Tiles
As Facing Stone, Garden Decoration, Paving Stone
Other Architectural Uses
Curbing
Curbing
Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate
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
Antiquity Uses
Artifacts, Jewellery, Sculpture, Small Figurines
Artifacts, Jewellery, Monuments
Commercial Uses
Cemetery Markers, Creating Artwork
Creating Artwork, Jewelry
Types
Intermediate volcanic rock
Algoma-type , Lake Superior-type and Superior-type
Features
Generally rough to touch, High silica content, Is one of the oldest rock
Is one of the oldest rock
Archaeological Significance
Formation
Icelandite 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.
Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
Coesite, Quartz, Sand
Compound Content
Silicon Dioxide
Fe, Iron(III) Oxide, Silicon Dioxide
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
-
Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion
Grain Size
Very fine-grained
Large and Coarse Grained
Fracture
Uneven
Conchoidal
Porosity
Less Porous
Very Less Porous
Specific Gravity
2.5-2.8
5.0-5.3
Transparency
Opaque
Translucent to Opaque
Density
2.11-2.36 g/cm3
0-5.7 g/cm3
Resistance
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
India, Indonesia, Japan, Nepal, South Korea
Russia
Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
-
Europe
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
Ukraine
Deposits in Western Continents
North America
Mexico, USA
Canada, USA
South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Brazil
Deposits in Oceania Continent
Australia
New South Wales, New Zealand, Western Australia
Western Australia