|
gptkbp:instanceOf
|
gptkb:granite
|
|
gptkbp:category
|
gptkb:Silicate_mineral
|
|
gptkbp:chemicalFormula
|
SiO2·nH2O
|
|
gptkbp:cleavage
|
None
|
|
gptkbp:color
|
Black
Brown
Green
Red
White
Yellow
|
|
gptkbp:containsMineral
|
Opal group
|
|
gptkbp:crystalSystem
|
gptkb:Amorphous
|
|
gptkbp:diaphaneity
|
Translucent
Opaque
|
|
gptkbp:distinctionFromPreciousOpal
|
Lacks play-of-color
|
|
gptkbp:event
|
Worldwide
|
|
gptkbp:fracture
|
Conchoidal
|
|
gptkbp:hardnessMohs
|
5.5–6.5
|
|
gptkbp:luster
|
Vitreous
Pearly
|
|
gptkbp:notablePlace
|
gptkb:Australia
gptkb:Brazil
gptkb:Ethiopia
gptkb:Mexico
gptkb:Slovakia
gptkb:United_States
|
|
gptkbp:notableVariant
|
Geyserite
Hyalite
Menilite
Milk opal
Moss opal
Resin opal
Wood opal
|
|
gptkbp:otherName
|
Potch
|
|
gptkbp:refractiveIndex
|
1.37–1.52
|
|
gptkbp:solubility
|
Insoluble in water
|
|
gptkbp:specificGravity
|
1.98–2.25
|
|
gptkbp:streak
|
White
|
|
gptkbp:tenacity
|
Brittle
|
|
gptkbp:transparency
|
Translucent
Opaque
|
|
gptkbp:uses
|
gptkb:granite
Ornamental stone
|
|
gptkbp:bfsParent
|
gptkb:Precious_Opal
gptkb:Australian_Opals
|
|
gptkbp:bfsLayer
|
8
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Common Opal
|