Identifying Ores of Antimony, Mercury, Nickel, Platinum ...
This ore has been already noticed under iron. Rare but valuable ores of nickel are millerite, nickelite, glance, and nickel bloom. Per cent nickel. Millerite NiS Niccolite NiAs Some of the nickel of commerce is derived from nickel bearing pyrrhotite. Platinum: This metal is only found native.