Assertion: matrix opal | /r/HasProperty | porous material
Facets:
value: from andamooka
type: LOCATION
value: from south australia
type: LOCATION
Source sentences:
text: Queensland Boulder Matrix Opal is distinguished by its ironstone host rock, while Andamooka Matrix Opal is a porous material from Andamooka, South Australia, which is often treated to enhance the colour by depositing black carbon via chemical treatment in the pore spaces in the stone.
text: Andamooka matrix opal is a porous material from Andamooka,South Australia, Which may be enhanced by soaking the specimen in a sugar solution and then boiling in acid to deposit carbon in the available pore spaces, resulting in a dark background.or Mullers Glass, is a colourless opal which gives the appearance of glass.
text: Queensland Boulder Matrix Opal is distinguished by its ironstone host rock, while Andamooka Matrix Opal is a porous material from Andamooka, South Australia, which is often treated to enhance the colour by depositing black carbon via chemical treatment in the pore spaces in the stone.