World on Instagram: "A stone disk with razor-thin blades, carved over many years ago,Its precision shape still challenges modern stoneworkers This object, known as the Sabu Disk, was discovered in 1936 at Saqqara, Egypt. It is carved from a single piece of fragile stone called schist, a material that easily cracks under pressure. The disk features a flat central hub, a thin circular rim, and three evenly spaced curved lobes, all shaped with fine symmetry. The walls of the stone are extremely thi