Assertion: cinnabar's mercury | /r/HasProperty | rare
Facets:
value: extremely
type: DEGREE
value: in earth's crust
type: LOCATION
Source sentences:
text: Mercury is extremely rare, found in the Earth's crust at a concentration of only 0.08 parts per million.
text: Mercury is an extremely rare element in Earth's crust, having an average crustal abundance by mass of only 0.08 parts per million (ppm).
text: Mercury is one of the rarest elements on the Earth’s crust and can be found in its elemental form in many regions on the Earth.