Assertion: opal | /r/HasProperty | deposited inside hollow geodes
Facets:
value: in successive layers
type: TEMPORAL
value: hydrothermally
type: MANNER
Source sentences:
text: The Opal is hydrothermally deposited inside hollow geodes in successive layers making Spencer Opal ideal for triplets as the thin layers of extremely high quality precious opal are very transparent with great colour intensity.