Assertion: chalcedony | /r/CapableOf | represent the silica setfree
Facets:
value: in vesicular hollows forming amygdales
type: LOCATION
Source sentences:
text: Chalcedony basically occurs as a secondary mineral in volcanic rocks, representing the silica setfree by the decomposition of the various silicates deposited in cracks, forming veins, or in vesicular hollows forming amygdales.