Assertion: quartz | /r/HasProperty | the most common material
Facets:
value: because of the skill
type: CAUSE
Source sentences:
text: Quartz is the most common material identified as the mystical substance maban in Australian Aboriginal mythology.
text: Because of the skill required, quartz is the most expensive glass to utilize.
text: It is the most abundant mineral found at Earth's surface, and its unique properties make it one of the most useful natural substances.