The Grade 1 Skybuilders' Stone is a high-fantasy crafting material with a smooth, polished surface that gleams under light, featuring a deep, earthy brown color with subtle golden veins running through it. Its shape is a perfectly symmetrical cube, each face adorned with intricate, glowing blue engravings that signify its magical properties and origin. The stone emits a soft, pulsating glow, indicating its potent energy and rarity within the game's crafting system.