Assertion: opal's inclusion | /r/HasSubevent | silky-appearing splotches
Facets:
value: often
type: TEMPORAL
value: with a blue hue
type: OTHER
Source sentences:
text: Inclusions of the mineral dumortierite within quartz pieces often result in silky-appearing splotches with a blue hue, shades giving off purple and/or grey colors additionally being found.