Assertion: pyrite's gold | /r/CapableOf | occur as scale
Facets:
value: in such small particles
type: OTHER
value: to be invisible
type: PURPOSE
Source sentences:
text: The gold in quartz veins occurs as grains and scales scattered through quartz irregularly, often in such small particles as to be invisible to the naked eye, or as aggregates of crystals in cavities in the quartz.