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Comments: Greenish, acicular penfieldite crystals.
Location: Laurium, Greece.
Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
Comments: White to clear or light blue, doubly terminated, striated penfieldite crystals from 0.5 to 2mm associated with boleite as micro coatings.
Location: Margarita mine, Sierra Gorda, Chile.
Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix