Jadeitite and Picrite
Definition
Definition
Jadeitite is a metamorphic rock usually found in blueschist grade metamorphic terrains
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
History
Origin
Unknown
Hawaii Islands
Discoverer
Unknown
Unknown
Etymology
From pyroxene mineral jadeite
From Greek pikros bitter + -ite, 19th century
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
Not Applicable
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Texture
Earthy
Earthy, Rough
Color
Black, Brown, Colourless, Green, Grey, White
Black, Brown, Colourless, Green, Grey, Pink, White, Yellow
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
Yes
Yes
Scratch Resistant
No
Yes
Stain Resistant
No
Yes
Wind Resistant
No
Yes
Acid Resistant
No
Yes
Appearance
Rough and Dull
Rough and Shiny
Uses
Architecture
Interior Uses
Decorative Aggregates, Homes, Interior Decoration
Countertops, Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
Garden Decoration, Office Buildings, Paving Stone
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
As Dimension Stone, Cutting Tool, Knives
As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Jewellery, Monuments, Sculpture
Artifacts, Monuments, Sculpture
Other Uses
Commercial Uses
Commemorative Tablets, Creating Artwork, Jewelry
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)
Types
Types
Not Available
Oceanite
Features
Host Rock for Lead
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
Not Used
Petroglyphs
Used
Not Used
Figurines
Used
Used
Fossils
Absent
Absent
Formation
Formation
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.
Picrite 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.
Composition
Mineral Content
Carbonate, Magnetite, Pyrrhotite, Serpentine, Sulfides
Biotite, Olivine, Plagioclase, Pyrrhotite
Compound Content
Ca, CaO, Carbon Dioxide, KCl, MgO, Sulfur Dioxide, Sulphur
Al, CaO, Carbon Dioxide, Mg, MgO
Transformation
Metamorphism
Yes
Yes
Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism
Weathering
No
Yes
Types of Weathering
Not Applicable
Biological Weathering
Erosion
Yes
Yes
Types of Erosion
Coastal Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Properties
Physical Properties
Hardness
3-5
6.8
Grain Size
Very fine-grained
Fine Grained
Fracture
Uneven
Uneven
Streak
White, Greenish White or Grey
White, Greenish White or Grey
Porosity
Less Porous
Less Porous
Luster
Waxy and Dull
Subvitreous to Dull
Compressive Strength
310.00 N/mm2
2
189.00 N/mm2
11
Cleavage
Irregular
Imperfect
Toughness
7
2.1
Specific Gravity
2.79-3
2.75-2.92
Transparency
Opaque
Opaque
Density
2.5-3 g/cm3
1.5-2.5 g/cm3
Thermal Properties
Specific Heat Capacity
0.95 kJ/Kg K
9
0.88 kJ/Kg K
13
Resistance
Heat Resistant, Water Resistant
Heat Resistant
Reserves
Deposits in Eastern Continents
Asia
India, Saudi Arabia, Singapore, South Korea
India, Russia
Africa
Ethiopia, Western Africa
South Africa
Europe
England, Georgia, Switzerland, United Kingdom
Iceland
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada
Canada, USA
South America
Colombia
Brazil
Deposits in Oceania Continent
Australia
Central Australia, New South Wales, New Zealand, Western Australia
Not Yet Found
All about Jadeitite and Picrite Properties
Know all about Jadeitite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Jadeitite belongs to Metamorphic Rocks while Picrite belongs to Igneous Rocks.Texture of Jadeitite is Earthy whereas that of Picrite is Earthy, Rough. Jadeitite appears Rough and Dull and Picrite appears Rough and Shiny. The luster of Jadeitite is waxy and dull while that of Picrite is subvitreous to dull. Jadeitite is available in black, brown, colourless, green, grey, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Jadeitite are commemorative tablets, creating artwork, jewelry and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).
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