Garnierite n. : An amorphous mineral of apple-green color; a hydrous silicate of nickel and magnesia. It is an important ore of nickel.

Example:


Taxonomy
Garnierite, nickel, free encyclopedia, minerals, wt, ultramafic rocks, mixture, nickel ore, search, pockets, veins, serpentinized, Jules Garnier, 1864, occurrence, lateritic weathering, nickel laterite, magnesium.

Defination from the web:
Garnierite is not a single mineral but a mixture of the Ni-Mg-hydrosilicates serpentine, talc, sepiolite, chlorite and smectite. These minerals occur in garnierite ores individually and in intimate mixtures. ...