Assertion: opal's color | /r/HasProperty | observed
Facets:
Source sentences:
text: The colors that are observed are determined by the spacing between the planes and the orientation of planes with respect to the incident light.
text: The colors that are observed are determined by the spacing between the planes and the orientation of planes with respect to the incident light.
text: The colors that are observed are determined by the spacing between the planes and the orientation of planes with respect to the incident light.