The 40th anniversary Adventurer’s Stone shock-resistant models are inspired by the stones known to adventurers as useful compasses since the Middle Ages. The G-SHOCK brand concept of continuous innovation inspires people to take on new challenges, and the design of this line is based on the value that these stones have always had to people seeking adventure. Based on the GM-S5600, the smaller version of the GM-5600, this design is inspired by translucent calcite. Laser engraving is layered with rainbow ion plating on the bezel to recreate calcite’s crystalline pattern and its refracted light glow. The dial and band are decorated with the same pattern.