Assertion: muskellunge's scale | /r/HasProperty | pigmented
Facets:
value: usually
type: DEGREE
Source sentences:
text: Scales are usually pigmented, but some types of scales are metallic, or iridescent, without pigments; because the thickness of the platelets is on the same order as the wavelength of visible light the plates lead to structural coloration and iridescence through the physical phenomenon described as thin-film optics.