The Grade 4 Skybuilders' Stone is a high-quality crafting material with a polished, smooth surface that gleams under light, showcasing its high-fantasy anime-inspired design. Its form is a symmetrical, geometric cube with slightly rounded edges, adorned with intricate, glowing engravings that pulse with a soft, luminous blue light, symbolizing its magical properties. The stone's color is a deep, vibrant azure with metallic silver accents, giving it a luxurious and otherworldly appearance.