English dictionary
bournonite
/'b/oU/rn/@/,n/aI/t/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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A mineral of a steel- gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper.
Source: webster1913