Assertion: stone | /r/CapableOf | undergo heat treatment
Facets:
value: routinely
type: TEMPORAL
value: to lessen green hues
type: PURPOSE
value: to improve color
type: PURPOSE
Source sentences:
text: These gems routinely undergo heat treatment to improve color, and some even have clarity enhancement similar to emeralds.
text: These stones routinely undergo heat treatment to lessen green hues, resulting in a more pure blue.