Assertion: fire opal | /r/HasProperty | inert
Facets:
Source sentences:
text: inert to strong green or yellowish green in long and short wave, may phosphoresce; fire opal: inert to moderate greenish brown in long and short wave, may phosphoresce Absorption spectra green stones: 660 nm, 470 nm cutoff Diagnostic features darkening upon heating Solubility hot salt water, bases, methanol, humic acid, hydrofluoric acid