RE:Germanium....From USGS publication:
PRICE
Germanium is generally traded through longterm supply contracts between consumers, producers, and traders. Publicly available prices represent estimates of representative prices in trades being executed on a particular day and are compiled through recurring interviews with individual traders. Germanium dioxide prices began the year at about $1,225 per kilogram, increased to about $1,300 per kilogram in late May, and remained at $1,300 per kilogram for the rest of the year. Germanium metal prices began the year at about $1,900 per kilogram, increased to $1,950 per kilogram in late February, and ended the year at $1,900 per kilogram.
RECOVERY
Becasue germanium is a byproduct metal, its supply was heavily reliant on zinc mine production, which increased slightly in 2014 from that in 2013. Although an important factor, global changes in zinc mine production may not be an indicator of a corresponding change in the supply of germanium. It has been estimated that less than 5% of the germanium contained in zinc concentrates reaches refineries that are capable of extracting and producing germanium (Mikolajczak, 2013, p. 9).