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gptkbp:instance_of
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gptkb:Iron_Age
|
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gptkbp:can_create
|
Metamorphic processes
Cooling magma
Crystallization of lava
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|
gptkbp:chemical_formula
|
XY(Si, Al)2 O6
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gptkbp:composed_of
|
Silicate
|
|
gptkbp:difficulty
|
5 to 7 on Mohs scale
|
|
gptkbp:has_cleavage
|
Two directions
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gptkbp:has_color
|
gptkb:Black
gptkb:Brown
gptkb:Green
|
|
gptkbp:has_crystal_system
|
Monoclinic
Orthorhombic
|
|
gptkbp:has_refractive_index
|
1.6 to 1.7
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Pyroxene
|
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gptkbp:is_associated_with
|
Olivine
Feldspar
Amphibole
|
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gptkbp:is_common_in
|
Ultramafic rocks
Intermediate rocks
Mafic rocks
|
|
gptkbp:is_divided_into
|
Clinopyroxene
Orthopyroxene
|
|
gptkbp:is_found_in
|
gptkb:volcano
Gabbro
Peridotite
Meteorites
Moon rocks
Mars rocks
|
|
gptkbp:is_part_of
|
gptkb:Mantle
gptkb:volcano
Metamorphic rock
Earth's crust
|
|
gptkbp:is_studied_in
|
Geochemistry
Mineralogy
Petrography
|
|
gptkbp:is_used_in
|
gptkb:ceramics
Geology
Glassmaking
Petrology
Construction materials
|
|
gptkbp:luster
|
Vitreous
Dull
|
|
gptkbp:population_density
|
3.2 to 3.6 g/cm³
|
|
gptkbp:bfsParent
|
gptkb:volcano
|
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gptkbp:bfsLayer
|
4
|