Donuts or pi stones are classics among pieces of jewellery made of crystals. This shape can be found among centuries’ old finds in China and has remained popular to this day. The most sophisticated donuts made of genuine Burmese Jade of which some are set in gold and decorated with Diamonds. Originally the donut symbolized a coin and stood for affluence. The donut shape is also classified as an energy collector and supports internal centering through the symbolism of its shape as a circle.