Assertion: emerald | /r/HasProperty | gemstone
Facets:
value: from the beryl family
type: OTHER
Source sentences:
text: Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3 ) 6 ) colored green by trace amounts of chromium and sometimes vanadium.
text: Emerald is a wedding anniversary gem It is also the gemstone that celebrates the 20th and the 35th wedding anniversary and who would not want an emerald on those special days?
text: Emerald is a gemstone from the Beryl family.