Ages ago in ancient China, Pi discs were used by emperors to communicate with heaven; they spoke to the gods through the center hole. There will be no heavenly discourse with these handsome cufflinks--the centers of the gleaming hand-fabricated Burmese jade discs are filled with sparkling old mine cut diamonds. Since Pi jewelry also represents intelligence, we believe this was a smart--and stylish--decision. Accompanied by a gemological report from Stone Group Laboratory stating: Natural - Burma, origin. Crafted in14 yellow gold, with the diamonds set in 18K white gold, they measure just under 3/4 inch diameter.