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Comments: Emerald green platy crystals to 0.75mm on a pink to white, siliceous matrix.
Location: Lone Star mine, Copperopolis, Yavapai County, Arizona.
Scale: Picture size 1.4 cm.
© Tom Loomis / Dakota Matrix
Comments: Dark, prismatic crystals of fornacite on matrix.
Location: El Khun mine, Anarak, Iran.
Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals