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Webster 1913 Edition

Noun.

[See

(Min.)

An iron-black ore of silver, consisting of silver, sulphur, and antimony, with some copper and arsenic.

Polybasite

polybasite ‎(countable and uncountable, plural polybasites)

(mineralogy) An iron-black ore of silver, consisting of silver, sulfur, and antimony, with some copper and arsenic.