The Grade 3 Skybuilders' Stone is a high-quality crafting material with a smooth, polished surface that reflects light subtly, giving it a luminous quality. Its shape is a perfectly symmetrical cube with slightly rounded edges, featuring intricate, glowing engravings that pulse faintly with aetheric energy. The stone's color is a deep, vibrant blue with lighter azure swirls that seem to move under its surface, suggesting its potent magical properties.