|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedWith
|
gptkb:chrysoberyl_group
|
|
gptkbp:birefringence
|
0.008–0.010
|
|
gptkbp:birthstoneFor
|
June
|
|
gptkbp:category
|
oxide mineral
|
|
gptkbp:chemicalFormula
|
BeAl2O4
|
|
gptkbp:cleavage
|
distinct
|
|
gptkbp:color
|
green
red
green in daylight
red in incandescent light
|
|
gptkbp:countryOfCitizenship
|
gptkb:Brazil
gptkb:Madagascar
gptkb:Russia
gptkb:Sri_Lanka
gptkb:Tanzania
|
|
gptkbp:crystalHabit
|
tabular
|
|
gptkbp:crystalSystem
|
orthorhombic
|
|
gptkbp:discoveredIn
|
gptkb:Ural_Mountains
1830
|
|
gptkbp:fluorescence
|
none
|
|
gptkbp:fracture
|
conchoidal
|
|
gptkbp:hardnessMohs
|
8.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Alexandrite
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedAfter
|
gptkb:Alexander_II_of_Russia
|
|
gptkbp:opticalPhenomenon
|
color change
|
|
gptkbp:pleochroism
|
strong
|
|
gptkbp:radioactive
|
non-radioactive
|
|
gptkbp:refractiveIndex
|
1.746–1.755
|
|
gptkbp:relatedGroup
|
gptkb:chrysoberyl
|
|
gptkbp:specificGravity
|
3.73
|
|
gptkbp:streak
|
white
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
transparent
|
|
gptkbp:uses
|
gptkb:jewelry
|
|
gptkbp:bfsParent
|
gptkb:Precious_Stone
gptkb:Gem
|
|
gptkbp:bfsLayer
|
6
|