|
gptkbp:instanceOf
|
granite
variety of quartz
|
|
gptkbp:alternativeName
|
gptkb:morion
cairngorm
|
|
gptkbp:associatedWith
|
hydrothermal veins
pegmatites
|
|
gptkbp:birefringence
|
0.009
|
|
gptkbp:category
|
tectosilicate
|
|
gptkbp:chemicalFormula
|
SiO2
|
|
gptkbp:cleavage
|
none
|
|
gptkbp:color
|
black
brown
grey
|
|
gptkbp:crystalHabit
|
massive
prismatic
|
|
gptkbp:crystalSystem
|
trigonal
|
|
gptkbp:foundIn
|
gptkb:Brazil
gptkb:Madagascar
gptkb:Scotland
gptkb:Switzerland
gptkb:United_States
|
|
gptkbp:fracture
|
conchoidal
|
|
gptkbp:hardnessMohs
|
7
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
smoky quartz
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:nationalGemstoneOf
|
gptkb:Scotland
|
|
gptkbp:opticalProperties
|
uniaxial (+)
|
|
gptkbp:originOfColor
|
aluminum impurities
natural irradiation
|
|
gptkbp:parentMineral
|
quartz
|
|
gptkbp:pleochroism
|
weak
|
|
gptkbp:radioactive
|
not radioactive
|
|
gptkbp:refractiveIndex
|
1.544–1.553
|
|
gptkbp:relatedGroup
|
silicate mineral
|
|
gptkbp:solubility
|
insoluble in water
|
|
gptkbp:specificGravity
|
2.65
|
|
gptkbp:streak
|
white
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
translucent
transparent
|
|
gptkbp:usedAs
|
gptkb:building
granite
|
|
gptkbp:bfsParent
|
gptkb:Amethyst
|
|
gptkbp:bfsLayer
|
5
|