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gptkbp:instance_of
|
gptkb:Iron_Age
|
|
gptkbp:characteristic
|
high density
birefringence
high refractive index
transparent to opaque
pleochroism
non-fluorescent
low birefringence
strong dispersion
|
|
gptkbp:chemical_formula
|
Mg Al2 O4
|
|
gptkbp:color
|
varies
|
|
gptkbp:difficulty
|
7.5 to 8 on Mohs scale
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
spinel
|
|
gptkbp:is_found_in
|
gptkb:Afghanistan
gptkb:Myanmar
gptkb:Pakistan
gptkb:Russia
gptkb:Tanzania
gptkb:United_States
gptkb:Vietnam
gptkb:Sri_Lanka
gptkb:Madagascar
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:occurs_in
|
found in metamorphic rocks
|
|
gptkbp:related_to
|
gptkb:granite
gptkb:Ferengi
gptkb:concert_tour
gptkb:jewelry
gptkb:Zynga
aluminum oxide
bauxite
topaz
apatite
corundum
|
|
gptkbp:structure
|
isometric
|
|
gptkbp:uses
|
gptkb:jewelry
industrial applications
|
|
gptkbp:varieties
|
gptkb:black_spinel
gptkb:blue_spinel
gptkb:pink_spinel
gptkb:purple_spinel
gptkb:colorless_spinel
gptkb:green_spinel
gptkb:orange_spinel
gptkb:ruby_spinel
|
|
gptkbp:bfsParent
|
gptkb:Spessartine
|
|
gptkbp:bfsLayer
|
5
|