Gold is the most valuable raw material of digital byproducts. It is the most sought after by landfill scavengers. Gold can often be found in the wiring of microchips and circuit boards. Often times in order to salvage the remnants of gold scavengers have to soak the circuit board in an acid bath.
 
Gold veneer can be seen in lo-res as well. Please pay attention to the "how it's made" tab to achieve optimal taping strategies.
 
Prices are per sq. ft.