Danalite is a mineral of the helvite group found mainly in granitepegmatite and in hydrothermal veins. Danalite was first discovered at Rockport, Cape Ann, Massachusetts and was confirmed as a distinct species in 1866 and was named in honour of James Dana, a mineralogist at Yale University. Danalite is an iron-rich mineral and appears in octahedra, dodecahedra and as granular masses, and is grey, yellow, red or brown in colour with a vitreous or resinouslustre. Research Danalite
 
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