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hancockite
Pink, lead-rich variety of Epidote. Hancockite is scientifically recognized as an individual mineral species with a chemical formula of CaPb2Al2Fe(SiO4)3(OH). Hancockite was named in honor of Elwood P. Hancock (1834-1916), a presitigous mineral collector specializing in New York and New Jersey minerals. His collection was acquired by The Mineralogical Museum of Harvard University in 1916 and is currently on loan to the New York State Museum in Albany. The IMA renamed this mineral in 2006 to Epidote-(Pb), though this name change has angered many in the mineral community and has generally not been accepted among collectors.
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