|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedMinerals
|
feldspar
quartz
beryl
tourmaline
|
|
gptkbp:birefringence
|
0.008–0.010
|
|
gptkbp:category
|
oxide mineral
|
|
gptkbp:chemicalFormula
|
BeAl2O4
|
|
gptkbp:cleavage
|
distinct
|
|
gptkbp:color
|
brown
green
red
yellow
colorless
|
|
gptkbp:crystalSystem
|
orthorhombic
|
|
gptkbp:discoveredIn
|
1789
|
|
gptkbp:event
|
pegmatites
alluvial deposits
mica schists
|
|
gptkbp:fracture
|
conchoidal
|
|
gptkbp:habit
|
prismatic crystals
tabular crystals
twinned crystals
|
|
gptkbp:hardnessMohs
|
8.5
|
|
gptkbp:hasVariant
|
alexandrite
cat's eye
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Chrysoberyl
|
|
gptkbp:IMA_symbol
|
gptkb:Cbl
|
|
gptkbp:luster
|
vitreous
|
|
gptkbp:namedAfter
|
Greek words for gold and beryl
|
|
gptkbp:opticalProperties
|
chatoyancy
double refraction
color change (alexandrite)
|
|
gptkbp:pleochroism
|
strong
|
|
gptkbp:radioactive
|
non-radioactive
|
|
gptkbp:refractiveIndex
|
1.746–1.755
|
|
gptkbp:source
|
gptkb:Brazil
gptkb:Madagascar
gptkb:Myanmar
gptkb:Russia
gptkb:Sri_Lanka
|
|
gptkbp:specificGravity
|
3.5–3.84
|
|
gptkbp:streak
|
white
|
|
gptkbp:tenacity
|
brittle
|
|
gptkbp:transparency
|
translucent
transparent
|
|
gptkbp:uses
|
granite
|
|
gptkbp:bfsParent
|
gptkb:Precious_Stone
|
|
gptkbp:bfsLayer
|
6
|