noun Download 🔗Share The orthorhombic form of iron disulfide, FeS2, occurring as yellow crystals. Examples : "The geology student identified the shiny, yellow crystals as marcasite, a form of iron pyrite. " geology mineral chemistry material substance Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share (jewellery) Pyrite. Examples : "The antique brooch was decorated with sparkling marcasite, giving it a vintage look. " material geology Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share Any of various metal sulfides, usually iron sulfide minerals. Examples : "The geology student identified the shiny, brass-yellow mineral as marcasite, an iron sulfide. " mineral geology material substance Chat with AIVocabulary GamePractice Reading