Assertion: black opal | /r/HasProperty | facetted in the cabochon shape
Facets:
value: with gemstone cutters
type: OTHER
Source sentences:
text: This was a ground-breaking parcel as previously, large Opals were facetted in the cabochon shape, with gemstone cutters unable to resist the temptation to follow the trend set by the more expensive Australian Opals with their finest Ethiopian material.