Of square form, surmounted by a ferocious dragon powerfully worked in meticulous precision with bulging eyes and flaring nostrils above long curling whiskers, the scaly, tightly coiled body depicted crouching on its haunches with a 'flaming pearl' below its jaws and surrounded by dense cloud swirls, the scales and flowing mane finely incised with its long tail coiled at the rear, the stone of a deep olive-green colour flecked with characteristic black speckles.