Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
From Greek tephra, ashes from Indo-European base, to burn
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Black, Brown, Green, Grey, White
Decorative Aggregates, Flooring, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings
Production of Lime, Soil Conditioner
Archaeological Significance
Tephrite 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.
Alkali feldspar, Nepheline, Plagioclase, Pyroxene
CaO, Carbon Dioxide, MgO, Silicon Dioxide
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion
Medium to Fine Coarse Grained
Crenulation and Pervasive
Heat Resistant, Impact Resistant
Deposits in Eastern Continents
Germany, Hungary, Italy, Portugal, Spain
Deposits in Western Continents
Deposits in Oceania Continent
New Zealand, Western Australia
Learn more about Properties of Tephrite
What is Tephrite? In this section, we will learn more about properties of Tephrite i.e. physical and thermal properties. Physical properties of Tephrite include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Tephrite is 90.00 N/mm2. Streak of Tephrite is bluish black while its cleavage is crenulation and pervasive. Luster of Tephrite is subvitreous to dull and its fracture is uneven. Tephrite is opaque in nature. Know all about Tephrite, What is Tephrite, its composition, features, facts and reserves in next sections.
Know about Composition of Tephrite
What is Tephrite composed of? Get to know about composition of Tephrite here. Tephrite definition gives information about the Formation of Tephrite and its composition.The composition of Tephrite can be further divided into mineral and compound content. The mineral content of Tephrite rock includes Alkali feldspar, Nepheline, Plagioclase, Pyroxene and The compound content of Tephrite rock includes CaO, Carbon Dioxide, MgO, Silicon Dioxide. Almost all rocks undergo transformation process. Know all about Tephrite rock in next section.