What is <has contributing factor> of <gemstone> ?
[]
Which  is contributing factor of gemstone ?
SELECT DISTINCT ?h WHERE { ?h property:has_contributing_factor resource:gemstone }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject>  ?answer. ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1479> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q83437>. }
select distinct ?answer where { ?answer wdt:P1479 wd:Q83437}
gem cutting