|
gptkbp:instanceOf
|
granite
|
|
gptkbp:associatedWith
|
Indigenous people
|
|
gptkbp:color
|
gptkb:Black_Opal
gptkb:Boulder_Opal
gptkb:Crystal_Opal
gptkb:White_Opal
|
|
gptkbp:composition
|
gptkb:Hydrated_Silica
|
|
gptkbp:contains
|
Water (3-21%)
|
|
gptkbp:density
|
1.98–2.25 g/cm³
|
|
gptkbp:exportedTo
|
gptkb:Australia
gptkb:Europe
gptkb:Japan
gptkb:United_States
|
|
gptkbp:exportIndustry
|
Significant to Australian economy
|
|
gptkbp:famousSpecimen
|
gptkb:Halley's_Comet_Opal
gptkb:Olympic_Australis
gptkb:Andamooka_Opal
gptkb:Fire_of_Australia
|
|
gptkbp:foundIn
|
gptkb:Australia
|
|
gptkbp:hardness
|
5.5-6.5 Mohs
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Australian Opals
|
|
gptkbp:majorMine
|
gptkb:Lightning_Ridge
gptkb:Andamooka
gptkb:Mintabie
gptkb:White_Cliffs
gptkb:Coober_Pedy
|
|
gptkbp:market
|
Over 90% of world opal supply
|
|
gptkbp:miningMethod
|
Open cut
Underground mining
|
|
gptkbp:miningStarted
|
Late 19th century
|
|
gptkbp:notableFor
|
Largest and most valuable opals
|
|
gptkbp:regulates
|
gptkb:Government_of_India
|
|
gptkbp:subjectOf
|
gptkb:Australian_postage_stamps
Scientific research
Documentaries
Australian folklore
Art and design
Gemstone exhibitions
Museums in Australia
Opal mining tourism
|
|
gptkbp:symbol
|
October Birthstone
|
|
gptkbp:type
|
gptkb:Precious_Opal
gptkb:Common_Opal
|
|
gptkbp:usedFor
|
gptkb:jewelry
|
|
gptkbp:valuation
|
Play of color
|
|
gptkbp:bfsParent
|
gptkb:Lauren_Jackson
|
|
gptkbp:bfsLayer
|
6
|