Assertion: emerald | /r/HasProperty | treated oiled
Facets:
value: to enhance the apparent clarity
type: PURPOSE
Source sentences:
text: Stones that lack surface breaking fissures are extremely rare and therefore almost all emeralds are treated ("oiled", see below) to enhance the apparent clarity.
text: Experts can also determine if an Emerald was treated with oil or a lubricant to mask internal flaw s.
text: Stones that lack surface breaking fissures are extremely rare and therefore almost all emeralds are treated ("oiled", see below) to enhance the apparent clarity.
text: To improve appearance, most cut emeralds are treated with oils, waxes, polymers, or other substances that enter the fractures and make them less obvious.