Olivenite

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Olivenite Natural Mineral From Majuba Hill Nevada USA Size-7.7cm x 5.6cm x 1.8cm Weight-79g You will receive the item in the photo Olivenite is a basic copper arsenate mineral.It b elongs to the arsenate mineral group in the mineral class. The crystal system is orthorhombic.Olivenite crystals are typically small and form in a few distinct fascinating shapes.Prismatic/acicioar: short,elongated or needle like crystals.Globular/Botryoidal: sparkling grape like crystals or radiating fibrous hemispheres. Wood copper: a specific fibrous radiating texture with a wood like colour banding.It is a secondary supergene mineral formed in the oxidized zones of copper and arsenic rich hydrothermal veins.It typically forms in the upper weathered portions of ore deposits where oxygen rich groundwater interacts with primary sulfide minerals. Hardness is 3 on the MOHs scale. Show more