"Black Gold" is, by common standards, a piggy bank, but more social commentary than simple money-saving apparatus. It was fashioned from asphalt, a by-product of the crude oil refinery process-the only oil to appear in solid form. As a collection, "Black Gold's" intent is to question its future value in time; a reflection of the consumerist society in which we live. In order to break open the bank, one must pour a secondary oil product over the piece, at which point the solid asphalt breaks down and returns to its original near-liquid state, leaving behind oil, stone, and the currency that was saved inside, or what remains of it.