5 Dollars - Elizabeth II The Great White Shark

The Pobjoy Mint has produced titanium coinage since the 1990s, longer than virtually any other private mint, and developed proprietary annealing techniques to achieve consistent coloration across the reactive metal's surface. Titanium's interference coloring — produced by oxide layer thickness, not pigment — means no two production runs yield precisely identical hues, which makes strict visual matching across a series genuinely difficult.