Assertion: peridot's color | /r/HasProperty | due
Facets:
value: to ferrous iron
type: CAUSE
Source sentences:
text: The source of the green coloration of the beach sands is due to the olivine crystals (whose green color is due to ferrous iron) which are winnowed from the eroding headland by the action of the sea.
text: The intense blue color is due to the presence of the trisulfur radical anion (S
text: The green color of this beautiful charm is due to the presence of iron which is present as its content.