Assertion: germanium | /r/HasProperty | polished into lens
Facets:
Source sentences:
text: Because germanium is transparent in the infrared wavelengths, it is an important infrared optical material that can be readily cut and polished into lenses and windows.
text: Because germanium is transparent in the infrared wavelengths, it is an important infrared optical material that can be readily cut and polished into lenses and windows.