Assertion: opal | /r/HasProperty | alluvial
Facets:
Source sentences:
text: Opals which have weathered out of the in situ deposits are alluvial and considered placer deposits.
text: Opals which have weathered out of the in situ deposits are alluvial and considered placer deposits.
text: Opals which have weathered out of the in-place deposits are alluvial and considered placer deposits.