Assertion: opal's variety | /r/HasProperty | porous
Facets:
Source sentences:
text: I am speaking of Australian, Brazilian and Mexican opal, not some of the less stable varieties that are so porous as to soak up water through their open lattice gaps.
text: I am speaking of Australian, Brazilian and Mexican opal, not some of the less stable varieties that are so porous as to soak up water through their open lattice gaps.