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MD-210689
Garnierite
Small Cabinet, 7.8 x 5.4 x 4.5 cm
Webster-Balsam, Jackson Co., North Carolina, USA
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Garnierite is the name for a green nickel ore which is found in pockets and fissures of weathered ultramafic rocks (serpentinite, dunite, peridotite). It forms by lateritic weathering of ultramafic rocks; it consists of the magnesium-rich phyllosilicates serpentine, talc, chlorite and smectite in which a high percentage of magnesium is substituted by nickel. This is an old-time specimen from mining in North Carolina.