Prehnite, Zoisite

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Prehnite crystals on zoisite, 5.5 cm, from the Merelani mine, Merelani Hills, Manyara region, Tanzania. Bill Dameron photo.

Product details

SizeSmall Cabinet
Dimensions5.5 cm
Added on02/13/2026
Publications
  • Mineralogical Record Mineral Collections In Pacific Northwest page 55

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Prehnite
Mineral guide
Learn about Prehnite
apple- to mint-green crystals and sculptural botryoidal/rosette forms; a calcium aluminum silicate formed in low-temp hydrothermal environments.
Prehnite
Regional guide
Prehnite from Merelani Hills, Tanzania
Merelani Hills prehnite, Tanzania: glossy translucent crystals on black graphite, lemon-to-mint colors, and a prized locality with context for collectors.