Hemimorphite, pseudo-morphs after Calcite, Greenockite
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Hemimorphite pseudomorphs after calcite crystals, colored yellow by inclusions of greenockite, 7.8 cm, from Joplin, Missouri. Ex collections of George Vaux, Jr., and Richard Hauck. Photo by Jeff Scovil.
Joplin Field, USA, Missouri heart of the Tri-State lead-zinc district; famed for layered galena-sphalerite specimens with calcite, dolomite, and marcasite.
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