Assertion: opal | /r/HasProperty | precious
Facets:
value: in monitory terms
type: MANNER
value: exceptionally
type: DEGREE
Source sentences:
text: Opal as part of the Australia’s National Gemstone is highly-prized and it is exceptionally precious in monitory terms.
text: Take the opal, a precious stone that forms out of silica, in the dark under the surface of the earth.
text: Really nice cabochons of Mexican jelly opal are usually small because the opal formed in the vugs of the pumice, and when they exhibit play of color, they are called "Precious Fire Opals.
text: Opals are precious gems and should be treated with care.
text: This professionalism endows the opal the precious value while this vertical fire is the key feature to distinguish lab-grown opal from the others.
text: Opals displaying play of color are known as precious opals, and opals lacking play of color are known as common opals.
text: Opal is the fourth Precious Gemstone!
text: This opal is considered a precious gemstone.
text: Opal has long been regarded as the fifth precious gemstone.
text: Not all opal is so precious however.
text: Opal is a precious stone.
text: Meeting both criteria, these opals could be called "precious fire opals.