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Definition of Geffroyite
1. Noun. (minerology) An isometric-hexoctahedral bronze brown mineral containing copper, iron, selenium, silver, and sulfur. ¹
¹ Source: wiktionary.com
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1. Noun. (minerology) An isometric-hexoctahedral bronze brown mineral containing copper, iron, selenium, silver, and sulfur. ¹
¹ Source: wiktionary.com