Germanium based on its price.Rhodium based on price and alloy valuePalladium based on alloy valueSilver based on money association.Neodymium based on industrial value (magnets)Terbium based on price and industrial value (special magnetic properties)Erbium price Tantalum priceTungsten rocket nozzlesRhenium Electrodes and fan blades in jetsIridium extreme high price $161,000/kiloPlatinum price and money associationGold price and money … Continue reading What Elements Could Be Contained in Paper Bullion Bank Bills ?