59^€

Garnierite prism from Madagascar

Weight 350 gr

CHARACTERISTICS
Weight	350 gr
Size	125x40x40 mm
Reference	210105002
Mineral	group of minerals Garnièrite
Category	Objects and fossils
Group	Prisms
Country	Madagascar

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Formula (Ni, Mg)₃Si₂O₅(OH)₄] GARNIÈRITE
Si	Silicon	Metalloids
O	Oxygen	Other no metal
Ni	Nickel	Transition metal
Mg	Magnesium	Alkaline earth metal
H	Hydrogen	Other no metal

Garnierite is a hydrosilicate mineral of nickel and magnesium, often associated with laterite deposits. It is generally green in color, ranging from light to dark green, due to its nickel content. Garnierite is mainly found in tropical and subtropical regions where climatic conditions favor the formation of laterites. It forms by alteration of ultrabasic rocks rich in olivine, such as peridotites and dunites, in the presence of water. Garnierite is an important source of nickel, and is therefore widely exploited for the extraction of this metal. Its density varies between 2.2 and 2.6, and its hardness on the Mohs scale is generally 3 to 4.

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